関: AA、ascorbic acid

ascorbic acid

PrepTutorEJDIC

アルコール中毒患者更生会
(映画で)14歳以下の児童観賞禁止の表示 / 14歳以下観賞禁止の
Automobile Association(英国の)自動車協会

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/11/01 17:23:31」(JST)

wiki en

[Wiki en表示]

ascorbic acid
(reduced form)

dehydroascorbic acid
(oxidized form)

Vitamin C or L-ascorbic acid, or simply ascorbate (the anion of ascorbic acid), is an essential nutrient for humans and certain other animal species. Vitamin C refers to a number of vitamers that have vitamin C activity in animals, including ascorbic acid and its salts, and some oxidized forms of the molecule like dehydroascorbic acid. Ascorbate and ascorbic acid are both naturally present in the body when either of these is introduced into cells, since the forms interconvert according to pH.

Vitamin C is a cofactor in at least eight enzymatic reactions, including several collagen synthesis reactions that, when dysfunctional, cause the most severe symptoms of scurvy.^[1] In animals, these reactions are especially important in wound-healing and in preventing bleeding from capillaries. Ascorbate may also act as an antioxidant against oxidative stress.^[2] However, the fact that the enantiomer D-ascorbate (not found in nature) has identical antioxidant activity to L-ascorbate, yet far less vitamin activity,^[3] underscores the fact that most of the function of L-ascorbate as a vitamin relies not on its antioxidant properties, but upon enzymic reactions that are stereospecific. "Ascorbate" without the letter for the enantiomeric form is always presumed to be the chemical L-ascorbate.

Ascorbate (the anion of ascorbic acid) is required for a range of essential metabolic reactions in all animals and plants. It is made internally by almost all organisms; the main exceptions are most bats, all guinea pigs, capybaras, and the Anthropoidea (i.e., Haplorrhini, one of the two major primate suborders, consisting of tarsiers, monkeys, and humans and other apes). Ascorbate is also not synthesized by some species of birds and fish. All species that do not synthesize ascorbate require it in the diet. Deficiency in this vitamin causes the disease scurvy in humans.^[1]^[4]^[5]

Ascorbic acid is also widely used as a food additive, to prevent oxidation.

1 Vitamers
2 Biological significance
- 2.1 Biosynthesis
- 2.2 Evolution
- 2.3 Absorption, transport, and excretion
- 2.4 Deficiency
- 2.5 Supplementation
  - 2.5.1 Cancer prevention
  - 2.5.2 Cardiovascular disease
  - 2.5.3 Chronic diseases
  - 2.5.4 Acute care
  - 2.5.5 Treatment of the common cold
3 Role in mammals
- 3.1 Enzymatic cofactor
- 3.2 Immune system
4 Role in plants
5 Daily requirements
- 5.1 Government recommended intake
6 Testing for ascorbate levels in the body
7 Adverse effects
- 7.1 Common side-effects
- 7.2 Possible side-effects
- 7.3 Overdose
8 Dietary sources
- 8.1 Plant sources
- 8.2 Animal sources
- 8.3 Food preparation
- 8.4 Supplements
- 8.5 Industrial synthesis
- 8.6 Food fortification
9 Compendial status
10 History
- 10.1 Discovery
11 Society and culture
12 See also
13 References
14 External links

Vitamers

The name 'vitamin C' always refers to the L-enantiomer of ascorbic acid and its oxidized forms. The opposite D-enantiomer called D-ascorbate has equal antioxidant power, but is not found in nature, and has no physiological significance. When D-ascorbate is synthesized and given to animals that require vitamin C in their diets, it has been found to have far less vitamin activity than the L-enantiomer.^[3] Therefore, unless written otherwise, "ascorbate" and "ascorbic acid" refer in the nutritional literature to L-ascorbate and L-ascorbic acid, respectively. This notation will be followed in this article. Similarly, their oxidized derivatives (dehydroascorbate, etc., see below) are all L-enantiomers, and also need not be written with full sterochemical notation here.

Ascorbic acid is a weak sugar acid structurally related to glucose. In biological systems, ascorbic acid can be found only at low pH, but in neutral solutions above pH 5 is predominantly found in the ionized form, ascorbate. All of these molecules have vitamin C activity, therefore, and are used synonymously with vitamin C, unless otherwise specified.

Biological significance

The biological role of ascorbate is to act as a reducing agent, donating electrons to various enzymatic and a few non-enzymatic reactions. The one- and two-electron oxidized forms of vitamin C, semidehydroascorbic acid and dehydroascorbic acid, respectively, can be reduced in the body by glutathione and NADPH-dependent enzymatic mechanisms.^[6]^[7] The presence of glutathione in cells and extracellular fluids helps maintain ascorbate in a reduced state.^[8]

Biosynthesis

Model of a vitamin C molecule. Black is carbon, red is oxygen, and white is hydrogen

The vast majority of animals and plants are able to synthesize vitamin C, through a sequence of enzyme-driven steps, which convert monosaccharides to vitamin C. In plants, this is accomplished through the conversion of mannose or galactose to ascorbic acid.^[9] In some animals, glucose needed to produce ascorbate in the liver (in mammals and perching birds) is extracted from glycogen; ascorbate synthesis is a glycogenolysis-dependent process.^[10] In reptiles and birds the biosynthesis is carried out in the kidneys.

Among the animals that have lost the ability to synthesize vitamin C are simians and tarsiers, which together make up one of two major primate suborders, Haplorrhini. This group includes humans. The other more primitive primates (Strepsirrhini) have the ability to make vitamin C. Synthesis does not occur in a number of species (perhaps all species) in the small rodent family Caviidae that includes guinea pigs and capybaras, but occurs in other rodents (rats and mice do not need vitamin C in their diet, for example).

A number of species of passerine birds also do not synthesize, but not all of them, and those that do not are not clearly related; there is a theory that the ability was lost separately a number of times in birds.^[11] In particular, the ability to synthesize vitamin C is presumed to have been lost and then later re-acquired in at least two cases.^[12]

All tested families of bats, including major insect and fruit-eating bat families, cannot synthesize vitamin C. A trace of gulonolactone oxidase (GULO) was detected in only 1 of 34 bat species tested, across the range of 6 families of bats tested.^[13] However, recent results show that there are at least two species of bats, frugivorous bat (Rousettus leschenaultii) and insectivorous bat (Hipposideros armiger), that retain their ability of vitamin C production.^[14]^[15] The ability to synthesize vitamin C has also been lost in teleost fish.^[11]

These animals all lack the L-gulonolactone oxidase (GULO) enzyme, which is required in the last step of vitamin C synthesis, because they have a differing non-synthesizing gene for the enzyme (Pseudogene ΨGULO).^[16] A similar non-functional gene is present in the genome of the guinea pigs and in primates, including humans.^[17]^[18] Some of these species (including humans) are able to make do with the lower levels available from their diets by recycling oxidised vitamin C.^[19]

Most simians consume the vitamin in amounts 10 to 20 times higher than that recommended by governments for humans.^[20] This discrepancy constitutes much of the basis of the controversy on current recommended dietary allowances. It is countered by arguments that humans are very good at conserving dietary vitamin C, and are able to maintain blood levels of vitamin C comparable with other simians, on a far smaller dietary intake.^{[citation needed]}

Like plants and animals, some microorganisms such as the yeast Saccharomyces cerevisiae have been shown to be able to synthesize vitamin C from simple sugars.^[21]^[22]

Evolution

Ascorbic acid or vitamin C is a common enzymatic cofactor in mammals used in the synthesis of collagen. Ascorbate is a powerful reducing agent capable of rapidly scavenging a number of reactive oxygen species (ROS). Freshwater teleost fishes also require dietary vitamin C in their diet or they will get scurvy. The most widely recognized symptoms of vitamin C deficiency in fishes are scoliosis, lordosis and dark skin coloration. Freshwater salmonids also show impaired collagen formation, internal/fin hemorrhage, spinal curvature and increased mortality. If these fishes are housed in seawater with algae and phytoplankton, then vitamin supplementation seems to be less important, it is presumed because of the availability of other, more ancient, antioxidants in natural marine environment.^[23]

Some scientists have suggested that loss of the vitamin C biosynthesis pathway may have played a role in rapid evolutionary changes, leading to hominids and the emergence of human beings.^[24]^[25]^[26] However, another theory is that the loss of ability to make vitamin C in simians may have occurred much farther back in evolutionary history than the emergence of humans or even apes, since it evidently occurred soon after the appearance of the first primates, yet sometime after the split of early primates into the two major suborders Haplorrhini (which cannot make vitamin C) and its sister suborder of non-tarsier prosimians, the Strepsirrhini ("wet-nosed" primates), which retained the ability to make vitamin C.^[27] According to molecular clock dating, these two suborder primate branches parted ways about 63 to 60 Mya.^[28] Approximately three to five million years later (58 Mya), only a short time afterward from an evolutionary perspective, the infraorder Tarsiiformes, whose only remaining family is that of the tarsier (Tarsiidae), branched off from the other haplorrhines.^[29]^[30] Since tarsiers also cannot make vitamin C, this implies the mutation had already occurred, and thus must have occurred between these two marker points (63 to 58 Mya).

It has been noted that the loss of the ability to synthesize ascorbate strikingly parallels the inability to break down uric acid, also a characteristic of primates. Uric acid and ascorbate are both strong reducing agents. This has led to the suggestion that, in higher primates, uric acid has taken over some of the functions of ascorbate.^[31]

Absorption, transport, and excretion

Ascorbic acid is absorbed in the body by both active transport and simple diffusion. Sodium-Dependent Active Transport—Sodium-Ascorbate Co-Transporters (SVCTs) and Hexose transporters (GLUTs)—are the two transporters required for absorption. SVCT1 and SVCT2 import the reduced form of ascorbate across plasma membrane.^[32] GLUT1 and GLUT3 are the two glucose transporters, and transfer only the dehydroascorbic acid form of Vitamin C.^[33] Although dehydroascorbic acid is absorbed in higher rate than ascorbate, the amount of dehydroascorbic acid found in plasma and tissues under normal conditions is low, as cells rapidly reduce dehydroascorbic acid to ascorbate.^[34]^[35] Thus, SVCTs appear to be the predominant system for vitamin C transport in the body.

SVCT2 is involved in vitamin C transport in almost every tissue,^[32] the notable exception being red blood cells, which lose SVCT proteins during maturation.^[36] "SVCT2 knockout" animals genetically engineered to lack this functional gene, die shortly after birth,^[37] suggesting that SVCT2-mediated vitamin C transport is necessary for life.

With regular intake the absorption rate varies between 70 to 95%. However, the degree of absorption decreases as intake increases. At high intake (1.25 g), fractional human absorption of ascorbic acid may be as low as 33%; at low intake (<200 mg) the absorption rate can reach up to 98%.^[38]

Ascorbate concentrations over renal re-absorption threshold pass freely into the urine and are excreted. At high dietary doses (corresponding to several hundred mg/day in humans) ascorbate is accumulated in the body until the plasma levels reach the renal resorption threshold, which is about 1.5 mg/dL in men and 1.3 mg/dL in women. Concentrations in the plasma larger than this value (thought to represent body saturation) are rapidly excreted in the urine with a half-life of about 30 minutes. Concentrations less than this threshold amount are actively retained by the kidneys, and the excretion half-life for the remainder of the vitamin C store in the body thus increases greatly, with the half-life lengthening as the body stores are depleted. This half-life rises until it is as long as 83 days by the onset of the first symptoms of scurvy.^[39]

Although the body's maximal store of vitamin C is largely determined by the renal threshold for blood, there are many tissues that maintain vitamin C concentrations far higher than in blood. Biological tissues that accumulate over 100 times the level in blood plasma of vitamin C are the adrenal glands, pituitary, thymus, corpus luteum, and retina.^[40] Those with 10 to 50 times the concentration present in blood plasma include the brain, spleen, lung, testicle, lymph nodes, liver, thyroid, small intestinal mucosa, leukocytes, pancreas, kidney, and salivary glands.

Ascorbic acid can be oxidized (broken down) in the human body by the enzyme L-ascorbate oxidase. Ascorbate that is not directly excreted in the urine as a result of body saturation or destroyed in other body metabolism is oxidized by this enzyme and removed.

Deficiency

Scurvy is an avitaminosis resulting from lack of vitamin C, since without this vitamin, the synthesized collagen is too unstable to perform its function. Scurvy leads to the formation of brown spots on the skin, spongy gums, and bleeding from all mucous membranes. The spots are most abundant on the thighs and legs, and a person with the ailment looks pale, feels depressed, and is partially immobilized. In advanced scurvy there are open, suppurating wounds and loss of teeth and, eventually, death. The human body can store only a certain amount of vitamin C,^[41] and so the body stores are depleted if fresh supplies are not consumed. The time frame for onset of symptoms of scurvy in unstressed adults on a completely vitamin C free diet, however, may range from one month to more than six months, depending on previous loading of vitamin C (see below).

Western societies generally consume far more than sufficient Vitamin C to prevent scurvy. In 2004, a Canadian Community health survey reported that Canadians of 19 years and above have intakes of vitamin C from food of 133 mg/d for males and 120 mg/d for females;^[42] these are higher than the RDA recommendations.

Notable human dietary studies of experimentally induced scurvy have been conducted on conscientious objectors during WW II in Britain, and on Iowa state prisoners in the late 1960s. These studies both found that all obvious symptoms of scurvy previously induced by an experimental scorbutic diet with extremely low vitamin C content could be completely reversed by additional vitamin C supplementation of only 10 mg a day. In these experiments, there was no clinical difference noted between men given 70 mg vitamin C per day (which produced blood level of vitamin C of about 0.55 mg/dl, about 1/3 of tissue saturation levels), and those given 10 mg per day. Men in the prison study developed the first signs of scurvy about 4 weeks after starting the vitamin C free diet, whereas in the British study, six to eight months were required, possibly due to the pre-loading of this group with a 70 mg/day supplement for six weeks before the scorbutic diet was fed.^[43]

Men in both studies on a diet devoid, or nearly devoid, of vitamin C had blood levels of vitamin C too low to be accurately measured when they developed signs of scurvy, and in the Iowa study, at this time were estimated (by labeled vitamin C dilution) to have a body pool of less than 300 mg, with daily turnover of only 2.5 mg/day, implying an instantaneous half-life of 83 days by this time (elimination constant of 4 months).^[44]

Supplementation

Studies of the potential of vitamin C supplementation to provide health benefits have provided conflicting results.

A 2013 systematic review by the U.S. Preventative Diseases Task Force was found no clear evidence that vitamin C supplementation conferred benefit in the prevention of cardiovascular disease or cancer.^[45] Similarly, a 2012 Cochrane review found no effect of vitamin C supplementation on overall mortality.^[46]

Cancer prevention

A 2013 Cochrane review found no evidence that vitamin C supplementation reduces the risk of lung cancer in healthy or high risk (smokers and asbestos exposed) people.^[47] A 2014 meta-analysis found weak evidence that vitamin C intake might protect against lung cancer risk.^[48] A second meta analysis found no effect on the risk of prostate cancer.^[45]

Two meta analyses evaluated the effect of vitamin C supplementation on the risk of colorectal cancer. One found a weak association between vitamin C consumption and reduced risk, and the other found no effect of supplementation.^[49]^[50]

A 2011 meta analysis failed to find support for the prevention of breast cancer with vitamin C supplementation,^[51] but a second study concluded that vitamin C may be associated with increased survival in those already diagnosed.^[52]

Cardiovascular disease

A 2013 meta analysis found no evidence that vitamin C supplementation reduces the risk of myocardial infarction, stroke, cardiovascular mortality, or all-cause mortality.^[53] However, a second analysis found an inverse relationship between circulating vitamin C levels or dietary vitamin C and the risk of stroke.^[54]

A meta-analysis of 44 clinical trials has shown a significant positive effect of vitamin C on endothelial function when taken at doses greater than 500 mg per day. The researchers noted that the effect of vitamin C supplementation appeared to be dependent on health status, with stronger effects in those at higher cardiovascular disease risk.^[55]

Chronic diseases

A 2010 review in the journal Alternative Therapies in Health and Medicine found no role for vitamin C supplementation in the treatment of rheumatoid arthritis.^[56]

Studies examining the effects of vitamin C intake on the risk of Alzheimer's disease have reached conflicting conclusions.^[57]^[58] Maintaining a healthy dietary intake is probably more important than supplementation for achieving any potential benefit.^[59]

Vitamin C supplementation above the RDA has been used in trials to study a potential effect on preventing and slowing the progression of age-related cataract, however no significant effects were found from the research.^[60]

Acute care

Studies with much higher doses of vitamin C, usually between 200 and 6000 mg/day, for the treatment of infections and wounds have shown inconsistent results.^[61]

Treatment of the common cold

Vitamin C's effect on the common cold has been extensively researched. It has not been shown effective in prevention or treatment of the common cold, except in limited circumstances (specifically, individuals exercising vigorously in cold environments).^[62]^[63] Routine vitamin C supplementation does not reduce the incidence or severity of the common cold in the general population, though it may reduce the duration of illness.^[62]^[64]

Role in mammals

In humans, vitamin C is essential to a healthy diet as well as being a highly effective antioxidant, acting to lessen oxidative stress; a substrate for ascorbate peroxidase in plants (APX is plant specific enzyme);^[5] and an enzyme cofactor for the biosynthesis of many important biochemicals. Vitamin C acts as an electron donor for important enzymes:^[65]

Enzymatic cofactor

Ascorbic acid performs numerous physiological functions in the human body. These functions include the synthesis of collagen, carnitine, and neurotransmitters; the synthesis and catabolism of tyrosine; and the metabolism of microsome.^[8] During biosynthesis ascorbate acts as a reducing agent, donating electrons and preventing oxidation to keep iron and copper atoms in their reduced states.

Vitamin C acts as an electron donor for eight different enzymes:^[65]

Three enzymes (prolyl-3-hydroxylase, prolyl-4-hydroxylase, and lysyl hydroxylase) that are required for the hydroxylation of proline and lysine in the synthesis of collagen.^[66]^[67]^[68] These reactions add hydroxyl groups to the amino acids proline or lysine in the collagen molecule via prolyl hydroxylase and lysyl hydroxylase, both requiring vitamin C as a cofactor. Hydroxylation allows the collagen molecule to assume its triple helix structure, and thus vitamin C is essential to the development and maintenance of scar tissue, blood vessels, and cartilage.^[41]

Two enzymes (ε-N-trimethyl-L-lysine hydroxylase and γ-butyrobetaine hydroxylase) that are necessary for synthesis of carnitine.^[69]^[70] Carnitine is essential for the transport of fatty acids into mitochondria for ATP generation.

The remaining three enzymes have the following functions in common, but have other functions as well:
- dopamine beta hydroxylase participates in the biosynthesis of norepinephrine from dopamine.^[71]^[72]
- Peptidylglycine alpha-amidating monooxygenase amidates peptide hormones by removing the glyoxylate residue from their c-terminal glycine residues. This increases peptide hormone stability and activity.^[73]^[74]
- 4-hydroxyphenylpyruvate dioxygenase modulates tyrosine metabolism.^[75]^[76]

Immune system

Vitamin C is found in high concentrations in immune cells, and is consumed quickly during infections. It is not certain how vitamin C interacts with the immune system; it has been hypothesized to modulate the activities of phagocytes, the production of cytokines and lymphocytes, and the number of cell adhesion molecules in monocytes.^[77]

Role in plants

Ascorbic acid is associated with chloroplasts and apparently plays a role in ameliorating the oxidative stress of photosynthesis. In addition, it has a number of other roles in cell division and protein modification. Plants appear to be able to make ascorbate by at least one other biochemical route that is different from the major route in animals, although precise details remain unknown.^[78]

Daily requirements

The North American Dietary Reference Intake recommends 90 milligrams per day and no more than 2 grams (2,000 milligrams) per day.^[79] Other related species sharing the same inability to produce vitamin C require exogenous vitamin C consumption 20 to 80 times this reference intake.^[80] There is continuing debate within the scientific community over the best dose schedule (the amount and frequency of intake) of vitamin C for maintaining optimal health in humans.^[81] A balanced diet without supplementation usually contains enough vitamin C to prevent scurvy in an average healthy adult, while those who are pregnant, smoke tobacco, or are under stress require slightly more.^[79]

United States vitamin C recommendations^[79]
Recommended Dietary Allowance (adult male)	90 mg per day
Recommended Dietary Allowance (adult female)	75 mg per day
Tolerable Upper Intake Level (adult male)	2,000 mg per day
Tolerable Upper Intake Level (adult female)	2,000 mg per day

Government recommended intake

Recommendations for vitamin C intake have been set by various national agencies:

40 milligrams per day or 280 milligrams per week taken all at once: the United Kingdom's Food Standards Agency^[1]
45 milligrams per day 300 milligrams per week: the World Health Organization^[82]
80 milligrams per day: the European Commission's Council on nutrition labeling^[83]
90 mg/day (males) and 75 mg/day (females): Health Canada 2007^[84]
60–95 milligrams per day: United States' National Academy of Sciences.^[79] The United States defined Tolerable Upper Intake Level for a 25-year-old male is 2,000 milligrams per day.
100 milligrams per day: Japan's National Institute of Health and Nutrition.^[85] The NIHN did not set a Tolerable Upper Intake Level.

Testing for ascorbate levels in the body

Simple tests use dichlorophenolindophenol, a redox indicator, to measure the levels of vitamin C in the urine and in serum or blood plasma. However these reflect recent dietary intake rather than the level of vitamin C in body stores.^[1] Reverse phase high performance liquid chromatography is used for determining the storage levels of vitamin C within lymphocytes and tissue. It has been observed that while serum or blood plasma levels follow the circadian rhythm or short term dietary changes, those within tissues themselves are more stable and give a better view of the availability of ascorbate within the organism. However, very few hospital laboratories are adequately equipped and trained to carry out such detailed analyses, and require samples to be analyzed in specialized laboratories.^[86]^[87]

Adverse effects

Common side-effects

Relatively large doses of ascorbic acid may cause indigestion, particularly when taken on an empty stomach. However, taking vitamin C in the form of sodium ascorbate and calcium ascorbate may minimize this effect.^[88] When taken in large doses, ascorbic acid causes diarrhea in healthy subjects. In one trial in 1936, doses of up to 6 grams of ascorbic acid were given to 29 infants, 93 children of preschool and school age, and 20 adults for more than 1400 days. With the higher doses, toxic manifestations were observed in five adults and four infants. The signs and symptoms in adults were nausea, vomiting, diarrhea, flushing of the face, headache, fatigue and disturbed sleep. The main toxic reactions in the infants were skin rashes.^[89]

Possible side-effects

As vitamin C enhances iron absorption,^[90] ^[91] iron poisoning can become an issue to people with rare iron overload disorders, such as haemochromatosis. A genetic condition that results in inadequate levels of the enzyme glucose-6-phosphate dehydrogenase (G6PD) can cause sufferers to develop hemolytic anemia after ingesting specific oxidizing substances, such as very large dosages of vitamin C.

There is a longstanding belief among the mainstream medical community that vitamin C causes kidney stones, which is based on little science.^[92] Although recent studies have found a relationship,^[93]^[94] a clear link between excess ascorbic acid intake and kidney stone formation has not been generally established.^[95] Some case reports exist for a link between patients with oxalate deposits and a history of high-dose vitamin C usage.^[96]

In a study conducted on rats, during the first month of pregnancy, high doses of vitamin C may suppress the production of progesterone from the corpus luteum.^[97] Progesterone, necessary for the maintenance of a pregnancy, is produced by the corpus luteum for the first few weeks, until the placenta is developed enough to produce its own source. By blocking this function of the corpus luteum, high doses of vitamin C (1000+ mg) are theorized to induce an early miscarriage. In a group of spontaneously aborting women at the end of the first trimester, the mean values of vitamin C were significantly higher in the aborting group. However, the authors do state: 'This could not be interpreted as an evidence of causal association.'^[98] However, in a previous study of 79 women with threatened, previous spontaneous, or habitual abortion, Javert and Stander (1943) had 91% success with 33 patients who received vitamin C together with bioflavonoids and vitamin K (only three abortions), whereas all of the 46 patients who did not receive the vitamins aborted.^[99]

A study in rats and humans suggested that adding Vitamin C supplements to an exercise training program lowered the expected effect of training on VO2 Max. Although the results in humans were not statistically significant, this study is often cited as evidence that high doses of Vitamin C have an adverse effect on exercise performance. In rats, it was shown that the additional Vitamin C resulted in lowered mitochondria production.^[100] Since rats are able to produce all of their needed Vitamin C, however, it is questionable whether they offer a relevant model of human physiological processes in this regard.

A cancer-causing mechanism of hexavalent chromium may be triggered by vitamin C.^[101]

Overdose

Vitamin C is water soluble, with dietary excesses not absorbed, and excesses in the blood rapidly excreted in the urine. It exhibits remarkably low toxicity. The LD₅₀ (the dose that will kill 50% of a population) in rats is generally accepted to be 11.9 grams per kilogram of body weight when given by forced gavage (orally). The mechanism of death from such doses (1.2% of body weight, or 0.84 kg for a 70 kg human) is unknown, but may be more mechanical than chemical.^[102] The LD₅₀ in humans remains unknown, given lack of any accidental or intentional poisoning death data. However, as with all substances tested in this way, the rat LD₅₀ is taken as a guide to its toxicity in humans.

Dietary sources

Rose hips are a particularly rich source of vitamin C

The richest natural sources are fruits and vegetables, and of those, the Kakadu plum and the camu camu fruit contain the highest concentration of the vitamin. It is also present in some cuts of meat, especially liver. Vitamin C is the most widely taken nutritional supplement and is available in a variety of forms, including tablets, drink mixes, crystals in capsules or naked crystals.

Vitamin C is absorbed by the intestines using a sodium-ion dependent channel. It is transported through the intestine via both glucose-sensitive and glucose-insensitive mechanisms. The presence of large quantities of sugar either in the intestines or in the blood can slow absorption.^[103]

Plant sources

While plants are generally a good source of vitamin C, the amount in foods of plant origin depends on the precise variety of the plant, soil condition, climate where it grew, length of time since it was picked, storage conditions, and method of preparation.^[104]

The following table is approximate and shows the relative abundance in different raw plant sources.^[105]^[106] As some plants were analyzed fresh while others were dried (thus, artifactually increasing concentration of individual constituents like vitamin C), the data are subject to potential variation and difficulties for comparison. The amount is given in milligrams per 100 grams of fruit or vegetable and is a rounded average from multiple authoritative sources:

Plant source	Amount (mg / 100g)
Kakadu plum	1000–5300^[107]^[108]^[109]
Camu Camu	2800^[106]^[110]
Acerola	1677^[111]
Seabuckthorn	695
Indian gooseberry	445
Rose hip	426^[112]
Baobab	400
Chili pepper (green)	244
Guava (common, raw)	228.3^[113]
Blackcurrant	200
Red pepper	190
Chili pepper (red)	144
Parsley	130
Kiwifruit	90
Broccoli	90
Loganberry	80
Redcurrant	80
Brussels sprouts	80
Wolfberry (Goji)	73 †
Lychee	70
Persimmon (native, raw)	66.0^[114]
Cloudberry	60
Elderberry	60

† average of 3 sources; dried

Plant source	Amount (mg / 100g)
Papaya	60
Strawberry	60
Orange	53
Lemon	53
Pineapple	48
Cauliflower	48
Kale	41
Melon, cantaloupe	40
Garlic	31
Grapefruit	30
Raspberry	30
Tangerine	30
Mandarin orange	30
Passion fruit	30
Spinach	30
Cabbage raw green	30
Lime	30
Mango	28
Blackberry	21
Potato	20
Melon, honeydew	20
Tomato, red	13.7^[115]
Cranberry	13
Tomato	10
Blueberry	10
Pawpaw	10

Plant source	Amount (mg / 100g)
Grape	10
Apricot	10
Plum	10
Watermelon	10
Banana	9
Avocado	8.8^[116]
Crabapple	8
Onion	7.4^[117]
Cherry	7
Peach	7
Carrot	6
Apple	6
Asparagus	6
Horned melon	5.3^[118]
Beetroot	5
Chokecherry	5
Pear	4
Lettuce	4
Cucumber	3
Eggplant	2
Raisin	2
Fig	2
Bilberry	1
Medlar	0.3

Source:^[119]

Animal sources

Goats, like almost all animals, make their own vitamin C. An adult goat, weighing approx. 70 kg, will manufacture more than 13,000 mg of vitamin C per day in normal health, and levels manyfold higher when faced with stress.^[120]^[121]

The overwhelming majority of species of animals (but not humans or guinea pigs) and plants synthesize their own vitamin C.^[122] Therefore, some animal products can be used as sources of dietary vitamin C.

Vitamin C is most present in the liver and least present in the muscle. Since muscle provides the majority of meat consumed in the western human diet, animal products are not a reliable source of the vitamin. Vitamin C is present in human breast milk, but only in limited quantity in raw cow's milk.^[123] All excess vitamin C is disposed of through the urinary system.

The following table shows the relative abundance of vitamin C in various foods of animal origin, given in milligrams of vitamin C per 100 grams of food:

Animal Source	Amount (mg / 100g)
Calf liver (raw)	36
Beef liver (raw)	31
Oysters (raw)	30
Cod roe (fried)	26
Pork liver (raw)	23
Lamb brain (boiled)	17
Chicken liver (fried)	13

Animal Source	Amount (mg / 100g)
Lamb liver (fried)	12
Calf adrenals (raw)	11^[124]
Lamb heart (roast)	11
Lamb tongue (stewed)	6
Camel milk (fresh)	5^[125]
Human milk (fresh)	4
Goat milk (fresh)	2
Cow milk (fresh)	2

Food preparation

Vitamin C chemically decomposes under certain conditions, many of which may occur during the cooking of food. Vitamin C concentrations in various food substances decrease with time in proportion to the temperature they are stored at^[126] and cooking can reduce the Vitamin C content of vegetables by around 60% possibly partly due to increased enzymatic destruction as it may be more significant at sub-boiling temperatures.^[127] Longer cooking times also add to this effect, as will copper food vessels, which catalyse the decomposition.^[102]

Another cause of vitamin C being lost from food is leaching, where the water-soluble vitamin dissolves into the cooking water, which is later poured away and not consumed. However, vitamin C does not leach in all vegetables at the same rate; research shows broccoli seems to retain more than any other.^[128] Research has also shown that fresh-cut fruits do not lose significant nutrients when stored in the refrigerator for a few days.^[129]

Supplements

Vitamin C is available in caplets, tablets, capsules, drink mix packets, in multi-vitamin formulations, in multiple antioxidant formulations, and as crystalline powder. Timed release versions are available, as are formulations containing bioflavonoids such as quercetin, hesperidin, and rutin. Tablet and capsule sizes range from 25 mg to 1500 mg. Vitamin C (as ascorbic acid) crystals are typically available in bottles containing 300 g to 1 kg of powder (a 5 ml teaspoon of vitamin C crystals equals 5,000 mg). The bottles are usually airtight and brown or opaque in order to prevent oxidation, in which case the vitamin C would become useless, if not damaging.

Industrial synthesis

Vitamin C is produced from glucose by two main routes. The Reichstein process, developed in the 1930s, uses a single pre-fermentation followed by a purely chemical route. The modern two-step fermentation process, originally developed in China in the 1960s, uses additional fermentation to replace part of the later chemical stages. Both processes yield approximately 60% vitamin C from the glucose feed.^[130]

Research is underway at the Scottish Crop Research Institute in the interest of creating a strain of yeast that can synthesize vitamin C in a single fermentation step from galactose, a technology expected to reduce manufacturing costs considerably.^[21]

World production of synthesized vitamin C is currently estimated at approximately 110,000 tonnes annually. The main producers have been BASF/Takeda, DSM, Merck and the China Pharmaceutical Group Ltd. of the People's Republic of China. By 2008 only the DSM plant in Scotland remained operational outside the strong price competition from China.^[131] The world price of vitamin C rose sharply in 2008 partly as a result of rises in basic food prices but also in anticipation of a stoppage of the two Chinese plants, situated at Shijiazhuang near Beijing, as part of a general shutdown of polluting industry in China over the period of the Olympic games.^[132] Five Chinese manufacturers met in 2010, among them Northeast Pharmaceutical Group and North China Pharmaceutical Group, and agreed to temporarily stop production in order to maintain prices.^[133] In 2011 an American suit was filed against four Chinese companies that allegedly colluded to limit production and fix prices of vitamin C in the United States. According to the plaintiffs, after the agreement was made spot prices for vitamin C shot to as high as $7 per kilogram in December 2002 from $2.50 per kilogram in December 2001. The companies did not deny the accusation but say in their defense that the Chinese government compelled them to act in this way.^[134] In January 2012 a US judge ruled that the Chinese companies can be sued in the U.S. by buyers acting as a group.^[135]

Food fortification

In 2005, Health Canada evaluated the effect of fortification of foods with ascorbate in the guidance document, Addition of Vitamins and Minerals to Food.^[136] Ascorbate was categorized as a 'Risk Category A nutrient', meaning it is a nutrient for which an upper limit for intake is set but allows a wide margin of intake that has a narrow margin of safety but non-serious critical adverse effects.^[136]

Compendial status

British Pharmacopoeia ^[137]
Japanese Pharmacopoeia ^[138]

History

James Lind, a British Royal Navy surgeon who, in 1747, identified that a quality in fruit prevented the disease of scurvy in what was the first recorded controlled experiment.

The need to include fresh plant food or raw animal flesh in the diet to prevent disease was known from ancient times. Native people living in marginal areas incorporated this into their medicinal lore. For example, spruce needles were used in temperate zones in infusions, or the leaves from species of drought-resistant trees in desert areas. In 1536, the French explorers Jacques Cartier and Daniel Knezevic, exploring the St. Lawrence River, used the local natives' knowledge to save his men who were dying of scurvy. He boiled the needles of the arbor vitae tree to make a tea that was later shown to contain 50 mg of vitamin C per 100 grams.^[139]^[140]

Authorities have occasionally recommended the benefit of plant food to promote health and prevent scurvy during long sea voyages. John Woodall, the first appointed surgeon to the British East India Company, recommended the preventive and curative use of lemon juice in his book, The Surgeon's Mate, in 1617.^[141] The Dutch writer, Johann Bachstrom, in 1734, gave the firm opinion that "scurvy is solely owing to a total abstinence from fresh vegetable food, and greens, which is alone the primary cause of the disease."^[142]^[143]

Scurvy had long been a principal killer of sailors during the long sea voyages.^[144] According to Jonathan Lamb, "In 1499, Vasco da Gama lost 116 of his crew of 170; In 1520, Magellan lost 208 out of 230;...all mainly to scurvy."^[145]

While the earliest documented case of scurvy was described by Hippocrates around 400 BC, the first attempt to give scientific basis for the cause of this disease was by a ship's surgeon in the British Royal Navy, James Lind. Scurvy was common among those with poor access to fresh fruit and vegetables, such as remote, isolated sailors and soldiers. While at sea in May 1747, Lind provided some crew members with two oranges and one lemon per day, in addition to normal rations, while others continued on cider, vinegar, sulfuric acid or seawater, along with their normal rations. In the history of science, this is considered to be the first occurrence of a controlled experiment. The results conclusively showed that citrus fruits prevented the disease. Lind published his work in 1753 in his Treatise on the Scurvy.^[146]

Citrus fruits were one of the first sources of vitamin C available to ships' surgeons.

Lind's work was slow to be noticed, partly because his Treatise was not published until six years after his study, and also because he recommended a lemon juice extract known as rob.^[147] Fresh fruit was very expensive to keep on board, whereas boiling it down to juice allowed easy storage but destroyed the vitamin (especially if boiled in copper kettles).^[102] Ship captains concluded wrongly that Lind's other suggestions were ineffective because those juices failed to prevent or cure scurvy.

It was 1795 before the British navy adopted lemons or lime as standard issue at sea. Limes were more popular, as they could be found in British West Indian Colonies, unlike lemons, which were not found in British Dominions, and were therefore more expensive. This practice led to the American use of the nickname "limey" to refer to the British. Captain James Cook had previously demonstrated and proven the principle of the advantages of carrying "Sour krout" on board, by taking his crews to the Hawaiian Islands and beyond without losing any of his men to scurvy.^[148] For this otherwise unheard of feat, the British Admiralty awarded him a medal.

The name antiscorbutic was used in the eighteenth and nineteenth centuries as general term for those foods known to prevent scurvy, even though there was no understanding of the reason for this. These foods included but were not limited to: lemons, limes, and oranges; sauerkraut, cabbage, malt, and portable soup.^[149]

Even before the antiscorbutic substance was identified, there were indications that it was present in amounts sufficient to prevent scurvy, in nearly all fresh (uncooked and uncured) foods, including raw animal-derived foods. In 1928, the Arctic anthropologist Vilhjalmur Stefansson attempted to prove his theory of how the Inuit are able to avoid scurvy with almost no plant food in their diet, despite the disease's striking European Arctic explorers living on similar high cooked-meat diets. Stefansson theorised that the natives get their vitamin C from fresh meat that is minimally cooked. Starting in February 1928, for one year he and a colleague lived on an exclusively minimally cooked meat diet while under medical supervision; they remained healthy. Later studies done after vitamin C could be quantified in mostly raw traditional food diets of the Yukon First Nations, Dene, Inuit, and Métis of the Northern Canada, showed that their daily intake of vitamin C averaged between 52 and 62 mg/day, an amount approximately the dietary reference intake (DRI), even at times of the year when little plant-based food was eaten.^[150]

Discovery

Albert Szent-Györgyi, pictured here in 1948, was awarded the 1937 Nobel Prize in Medicine "for his discoveries in connection with the biological combustion processes, with special reference to vitamin C and the catalysis of fumaric acid".^[151]

In 1907, the needed biological-assay model to isolate and identify the antiscorbutic factor was discovered. Axel Holst and Theodor Frølich, two Norwegian physicians studying shipboard beriberi in the Norwegian fishing fleet, wanted a small test mammal to substitute for the pigeons then used in beriberi research. They fed guinea pigs their test diet of grains and flour, which had earlier produced beriberi in their pigeons, and were surprised when classic scurvy resulted instead. This was a serendipitous choice of model. Until that time, scurvy had not been observed in any organism apart from humans, and had been considered an exclusively human disease. (Pigeons, as seed-eating birds, were also later found to make their own vitamin C.) Holst and Frølich found they could cure the disease in guinea pigs with the addition of various fresh foods and extracts. This discovery of a clean animal experimental model for scurvy, made even before the essential idea of vitamins in foods had even been put forward, has been called the single most important piece of vitamin C research.^[152]

In 1912, the Polish American biochemist Casimir Funk, while researching beriberi in pigeons, developed the concept of vitamins to refer to the non-mineral micronutrients that are essential to health. The name is a blend of "vital", due to the vital biochemical role they play, and "amines" because Funk thought that all these materials were chemical amines. Although the "e" was dropped after skepticism that all these compounds were amines, the word vitamin remained as a generic name for them. One of the vitamins was thought to be the anti-scorbutic factor in foods discovered by Holst and Frølich. In 1928, this vitamin was referred to as "water-soluble C," although its chemical structure had still not been determined.^[153]

From 1928 to 1932, the Hungarian research team of Albert Szent-Györgyi and Joseph L. Svirbely, as well as the American team led by Charles Glen King in Pittsburgh, first identified the anti-scorbutic factor. Szent-Györgyi had isolated the chemical hexuronic acid (actually, L-hexuronic acid) from animal adrenal glands at the Mayo clinic, and suspected it to be the antiscorbutic factor but could not prove it without a biological assay. At the same time, for five years King's laboratory at the University of Pittsburgh had been trying to isolate the antiscorbutic factor in lemon juice using the original 1907 model of scorbutic guinea pigs which developed scurvy when not fed fresh foods but were cured by lemon juice. They had also considered hexuronic acid, but had been put off the trail when a coworker made the explicit (and mistaken) experimental claim that this substance was not the antiscorbutic substance.^[154]

Finally, in late 1931, Szent-Györgyi gave Svirbely, formerly of King's lab, the last of his hexuronic acid with the suggestion that it might be the anti-scorbutic factor. By the spring of 1932, King's laboratory had proven this but published the result without giving Szent-Györgyi credit for it, leading to a bitter dispute over priority claims (in reality it had taken a team effort by both groups, since Szent-Györgyi was unwilling to do the difficult and messy animal studies).^[154]

Meanwhile, by 1932, Szent-Györgyi had moved to Hungary and his group had discovered that paprika peppers, a common spice in the Hungarian diet, was a rich source of hexuronic acid, the antiscorbutic factor. With a new and plentiful source of the vitamin, Szent-Györgyi sent a sample to noted British sugar chemist Walter Norman Haworth, who chemically identified it and proved the identification by synthesis in 1933.^[155]^[156]^[157] Haworth and Szent-Györgyi now proposed that the substance L-hexuronic acid be called a-scorbic acid, and chemically L-ascorbic acid, in honor of its activity against scurvy.^[158] Ascorbic acid turned out not to be an amine, nor even to contain any nitrogen.

In part, in recognition of his accomplishment with vitamin C, Szent-Györgyi was awarded the unshared 1937 Nobel Prize in Medicine.^[159] Haworth also shared that year's Nobel Prize in Chemistry, in part for his vitamin C synthetic work.^[151]

Between 1933 and 1934 not only Haworth and fellow British chemist (later Sir) Edmund Hirst had synthesized vitamin C, but also, independently, the Polish chemist Tadeus Reichstein, succeeded in synthesizing the vitamin in bulk, making it the first vitamin to be artificially produced.^[160] The latter process made possible the cheap mass-production of semi-synthetic vitamin C, which was quickly marketed. Only Haworth was awarded the 1937 Nobel Prize in Chemistry in part for this work, but the Reichstein process, a combined chemical and bacterial fermentation sequence still used today to produce vitamin C, retained Reichstein's name.^[161]^[162] In 1934 Hoffmann–La Roche, which bought the Reichstein process patent, became the first pharmaceutical company to mass-produce and market synthetic vitamin C, under the brand name of Redoxon.^[163]

In 1957, the American J.J. Burns showed that the reason some mammals are susceptible to scurvy is the inability of their liver to produce the active enzyme L-gulonolactone oxidase, which is the last of the chain of four enzymes that synthesize vitamin C.^[164]^[165] American biochemist Irwin Stone was the first to exploit vitamin C for its food preservative properties. He later developed the theory that humans possess a mutated form of the L-gulonolactone oxidase coding gene.^[166]

In 2008, researchers at the University of Montpellier discovered that in humans and other primates the red blood cells have evolved a mechanism to more efficiently utilize the vitamin C present in the body by recycling oxidized L-dehydroascorbic acid (DHA) back into ascorbic acid which can be reused by the body. The mechanism was not found to be present in mammals that synthesize their own vitamin C.^[19]

Society and culture

In February 2011 Swiss Post issued a postage stamp bearing a depiction of a model of a molecule of vitamin C to mark the International Year of Chemistry. Swiss chemist Tadeus Reichstein synthesized the vitamin for the first time in 1933.^[167]

References

^ ^a ^b ^c ^d "Vitamin C". Food Standards Agency (UK). Retrieved February 19, 2007.
^ Padayatty SJ, Katz A, Wang Y, Eck P, Kwon O, Lee JH, Chen S, Corpe C, Dutta A, Dutta SK, Levine M (February 2003). "Vitamin C as an antioxidant: evaluation of its role in disease prevention". J Am Coll Nutr 22 (1): 18–35. doi:10.1080/07315724.2003.10719272. PMID 12569111.
^ ^a ^b Aboul-Enein HY, Al-Duraibi IA, Stefan RI, Radoi C, Avramescu A (1999). "Analysis of L- and D-ascorbic acid in fruits and fruit drinks by HPLC". Seminars in Food Analysis 4 (1): 31–37. Archived from the original on December 15, 2013.
^ "Vitamin C". University of Maryland Medical Center. January 2007. Retrieved March 31, 2008.
^ ^a ^b Higdon J (January 31, 2006). "Vitamin C". Oregon State University, Micronutrient Information Center. Retrieved March 7, 2007.
^ Meister A (April 1994). "Glutathione-ascorbic acid antioxidant system in animals". J. Biol. Chem. 269 (13): 9397–400. PMID 8144521.
^ Michels A, Frei B (2012). "Vitamin C". In Caudill MA, Rogers M. Biochemical, Physiological, and Molecular Aspects of Human Nutrition (3 ed.). Philadelphia: Saunders. pp. 627–654. ISBN 1-4377-0959-1.
^ ^a ^b Gropper SS, Smith JL, Grodd JL (2005). Advanced nutrition and human metabolism. Belmont, CA: Thomson Wadsworth. pp. 260–275. ISBN 0-534-55986-7.
^ Wheeler GL, Jones MA, Smirnoff N (May 1998). "The biosynthetic pathway of vitamin C in higher plants". Nature 393 (6683): 365–9. Bibcode:1998Natur.393..365W. doi:10.1038/30728. PMID 9620799.
^ Bánhegyi G, Mándl J (2001). "The hepatic glycogenoreticular system". Pathol. Oncol. Res. 7 (2): 107–10. doi:10.1007/BF03032575. PMID 11458272.
^ ^a ^b Martinez del Rio C (July 1997). "Can passerines synthesize vitamin C?". The Auk 114 (3): 513–16. doi:10.2307/4089257. JSTOR 4089257. Retrieved May 2, 2011.
^ Drouin G, Godin JR, Pagé B (2011). "The genetics of vitamin C loss in vertebrates". Curr. Genomics 12 (5): 371–8. doi:10.2174/138920211796429736. PMC 3145266. PMID 22294879.
^ Jenness R, Birney E, Ayaz K (1980). "Variation of l-gulonolactone oxidase activity in placental mammals". Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology 67 (2): 195–204. doi:10.1016/0305-0491(80)90131-5.
^ Cui J, Pan YH, Zhang Y, Jones G, Zhang S (Feb 2011). "Progressive pseudogenization: vitamin C synthesis and its loss in bats". Mol. Biol. Evol. 28 (2): 1025–31. doi:10.1093/molbev/msq286. PMID 21037206.
^ Cui J, Yuan X, Wang L, Jones G, Zhang S (Nov 2011). "Recent loss of vitamin C biosynthesis ability in bats". PLoS ONE 6 (11): e27114. doi:10.1371/journal.pone.0027114. PMID 22069493.
^ Harris JW (1996). Ascorbic acid: biochemistry and biomedical cell biology. New York: Plenum Press. p. 35. ISBN 0-306-45148-4.
^ Nishikimi M, Kawai T, Yagi K (October 1992). "Guinea pigs possess a highly mutated gene for L-gulono-gamma-lactone oxidase, the key enzyme for L-ascorbic acid biosynthesis missing in this species". J. Biol. Chem. 267 (30): 21967–72. PMID 1400507.
^ Ohta Y, Nishikimi M (October 1999). "Random nucleotide substitutions in primate nonfunctional gene for L-gulono-gamma-lactone oxidase, the missing enzyme in L-ascorbic acid biosynthesis". Biochim. Biophys. Acta 1472 (1–2): 408–11. doi:10.1016/S0304-4165(99)00123-3. PMID 10572964.
^ ^a ^b Montel-Hagen A, Kinet S, Manel N, Mongellaz C, Prohaska R, Battini JL, Delaunay J, Sitbon M, Taylor N (March 2008). "Erythrocyte Glut1 triggers dehydroascorbic acid uptake in mammals unable to synthesize vitamin C". Cell 132 (6): 1039–48. doi:10.1016/j.cell.2008.01.042. PMID 18358815. Lay summary – Science Daily (March 21, 2008).
^ Milton K (June 1999). "Nutritional characteristics of wild primate foods: do the diets of our closest living relatives have lessons for us?". Nutrition 15 (6): 488–98. doi:10.1016/S0899-9007(99)00078-7. PMID 10378206.
^ ^a ^b Hancock RD, Viola R. "Ascorbic acid biosynthesis in higher plants and microorganisms" (PDF). Scottish Crop Research Institute. Retrieved February 20, 2007.
^ Hancock RD, Galpin JR, Viola R (May 2000). "Biosynthesis of L-ascorbic acid (vitamin C) by Saccharomyces cerevisiae". FEMS Microbiol. Lett. 186 (2): 245–50. doi:10.1111/j.1574-6968.2000.tb09112.x. PMID 10802179.
^ Hardie LJ, Fletcher TC, Secombes CJ (1991). "The effect of dietary vitamin C on the immune response of the Atlantic salmon (Salmo salar L.)". Aquaculture 95 (3–4): 201–14. doi:10.1016/0044-8486(91)90087-N.
^ Challem JJ, Taylor EW (July 1998). "Retroviruses, ascorbate, and mutations, in the evolution of Homo sapiens". Free Radic. Biol. Med. 25 (1): 130–2. doi:10.1016/S0891-5849(98)00034-3. PMID 9655531.
^ Bánhegyi G, Braun L, Csala M, Puskás F, Mandl J (1997). "Ascorbate metabolism and its regulation in animals". Free Radic. Biol. Med. 23 (5): 793–803. doi:10.1016/S0891-5849(97)00062-2. PMID 9296457.
^ Stone I (June 1979). "Homo sapiens ascorbicus, a biochemically corrected robust human mutant". Med. Hypotheses 5 (6): 711–21. doi:10.1016/0306-9877(79)90093-8. PMID 491997.
^ Pollock JI, Mullin RJ (May 1987). "Vitamin C biosynthesis in prosimians: evidence for the anthropoid affinity of Tarsius". Am. J. Phys. Anthropol. 73 (1): 65–70. doi:10.1002/ajpa.1330730106. PMID 3113259.
^ Poux C, Douzery EJ (May 2004). "Primate phylogeny, evolutionary rate variations, and divergence times: a contribution from the nuclear gene IRBP". Am. J. Phys. Anthropol. 124 (1): 1–16. doi:10.1002/ajpa.10322. PMID 15085543.
^ Goodman M, Porter CA, Czelusniak J, Page SL, Schneider H, Shoshani J, Gunnell G, Groves CP (June 1998). "Toward a phylogenetic classification of Primates based on DNA evidence complemented by fossil evidence". Mol. Phylogenet. Evol. 9 (3): 585–98. doi:10.1006/mpev.1998.0495. PMID 9668008.
^ Porter CA, Page SL, Czelusniak J, Schneider H, Schneider MPC, Sampaio I, Goodman M (January 1997). "Phylogeny and Evolution of Selected Primates as Determined by Sequences of the ε-Globin Locus and 5′ Flanking Regions". International Journal of Primatology 18 (2): 261–295. doi:10.1023/A:1026328804319.
^ Proctor P (November 1970). "Similar functions of uric acid and ascorbate in man?". Nature 228 (5274): 868. Bibcode:1970Natur.228..868P. doi:10.1038/228868a0. PMID 5477017.
^ ^a ^b Savini I, Rossi A, Pierro C, Avigliano L, Catani MV (April 2008). "SVCT1 and SVCT2: key proteins for vitamin C uptake". Amino Acids 34 (3): 347–55. doi:10.1007/s00726-007-0555-7. PMID 17541511.
^ Rumsey SC, Kwon O, Xu GW, Burant CF, Simpson I, Levine M (July 1997). "Glucose transporter isoforms GLUT1 and GLUT3 transport dehydroascorbic acid". J. Biol. Chem. 272 (30): 18982–9. doi:10.1074/jbc.272.30.18982. PMID 9228080.
^ May JM, Qu ZC, Neel DR, Li X (May 2003). "Recycling of vitamin C from its oxidized forms by human endothelial cells". Biochim. Biophys. Acta 1640 (2–3): 153–61. doi:10.1016/S0167-4889(03)00043-0. PMID 12729925.
^ Packer L (1997). "Vitamin C and redox cycling antioxidants". In Fuchs J, Packer L. Vitamin C in health and disease. New York: M. Dekker. ISBN 0-8247-9313-7. ^{[page needed]}
^ May JM, Qu ZC, Qiao H, Koury MJ (August 2007). "Maturational loss of the vitamin C transporter in erythrocytes". Biochem. Biophys. Res. Commun. 360 (1): 295–8. doi:10.1016/j.bbrc.2007.06.072. PMC 1964531. PMID 17586466.
^ Sotiriou S, Gispert S, Cheng J, Wang Y, Chen A, Hoogstraten-Miller S, Miller GF, Kwon O, Levine M, Guttentag SH, Nussbaum RL (May 2002). "Ascorbic-acid transporter Slc23a1 is essential for vitamin C transport into the brain and for perinatal survival". Nat. Med. 8 (5): 514–7. doi:10.1038/nm0502-514. PMID 11984597.
^ Levine M, Conry-Cantilena C, Wang Y, Welch RW, Washko PW, Dhariwal KR, Park JB, Lazarev A, Graumlich JF, King J, Cantilena LR (April 1996). "Vitamin C pharmacokinetics in healthy volunteers: evidence for a recommended dietary allowance". Proc. Natl. Acad. Sci. U.S.A. 93 (8): 3704–9. Bibcode:1996PNAS...93.3704L. doi:10.1073/pnas.93.8.3704. PMC 39676. PMID 8623000.
^ Oreopoulos DG, Lindeman RD, VanderJagt DJ, Tzamaloukas AH, Bhagavan HN, Garry PJ (October 1993). "Renal excretion of ascorbic acid: effect of age and sex". J Am Coll Nutr 12 (5): 537–42. doi:10.1080/07315724.1993.10718349. PMID 8263270.
^ Hediger MA (May 2002). "New view at C". Nat. Med. 8 (5): 445–6. doi:10.1038/nm0502-445. PMID 11984580.
^ ^a ^b MedlinePlus Encyclopedia Ascorbic acid
^ Statistics Canada, Canadian Community Health Survey, Cycle 2.2, Nutrition (2004)^{[dead link]}
^ Pemberton J (June 2006). "Medical experiments carried out in Sheffield on conscientious objectors to military service during the 1939-45 war". Int J Epidemiol 35 (3): 556–8. doi:10.1093/ije/dyl020. PMID 16510534.
^ Hodges RE, Baker EM, Hood J, Sauberlich HE, March SC (May 1969). "Experimental scurvy in man". Am. J. Clin. Nutr. 22 (5): 535–48. PMID 4977512.
^ ^a ^b Stratton J, Godwin M (June 2011). "The effect of supplemental vitamins and minerals on the development of prostate cancer: a systematic review and meta-analysis". Fam Pract 28 (3): 243–52. doi:10.1093/fampra/cmq115. PMID 21273283.
^ Bjelakovic G, Nikolova D, Gluud LL, Simonetti RG, Gluud C (2012). "Antioxidant supplements for prevention of mortality in healthy participants and patients with various diseases". Cochrane Database Syst Rev 3: CD007176. doi:10.1002/14651858.CD007176.pub2. PMID 22419320.
^ Cortés-Jofré M, Rueda JR, Corsini-Muñoz G, Fonseca-Cortés C, Caraballoso M, Bonfill Cosp X (2012). "Drugs for preventing lung cancer in healthy people". Cochrane Database Syst Rev 10: CD002141. doi:10.1002/14651858.CD002141.pub2. PMID 23076895.
^ Luo, Jie; Shen, Li; Zheng, Di (22 August 2014). "Association between vitamin C intake and lung cancer: a dose-response meta-analysis". Scientific Reports 4: 6161. doi:10.1038/srep06161.
^ Xu X, Yu E, Liu L, et al. (November 2013). "Dietary intake of vitamins A, C, and E and the risk of colorectal adenoma: a meta-analysis of observational studies". Eur. J. Cancer Prev. 22 (6): 529–39. doi:10.1097/CEJ.0b013e328364f1eb. PMID 24064545.
^ Papaioannou D, Cooper KL, Carroll C, et al. (October 2011). "Antioxidants in the chemoprevention of colorectal cancer and colorectal adenomas in the general population: a systematic review and meta-analysis". Colorectal Dis 13 (10): 1085–99. doi:10.1111/j.1463-1318.2010.02289.x. PMID 20412095.
^ Fulan H, Changxing J, Baina WY, et al. (October 2011). "Retinol, vitamins A, C, and E and breast cancer risk: a meta-analysis and meta-regression". Cancer Causes Control 22 (10): 1383–96. doi:10.1007/s10552-011-9811-y. PMID 21761132.
^ Harris HR, Orsini N, Wolk A (May 2014). "Vitamin C and survival among women with breast cancer: a meta-analysis". Eur. J. Cancer 50 (7): 1223–31. doi:10.1016/j.ejca.2014.02.013. PMID 24613622.
^ Ye Y, Li J, Yuan Z (2013). "Effect of antioxidant vitamin supplementation on cardiovascular outcomes: a meta-analysis of randomized controlled trials". PLoS ONE 8 (2): e56803. doi:10.1371/journal.pone.0056803. PMC 3577664. PMID 23437244.
^ Chen GC, Lu DB, Pang Z, Liu QF (2013). "Vitamin C intake, circulating vitamin C and risk of stroke: a meta-analysis of prospective studies". J Am Heart Assoc 2 (6): e000329. doi:10.1161/JAHA.113.000329. PMC 3886767. PMID 24284213.
^ Effect of vitamin C on endothelial function in health and disease: A systematic review and meta-analysis of randomised controlled trials Atherosclerosis Volume 235, Issue 1, Pages 9–20, July 2014. Published April 16, 2014. Accessed June 25, 2014.
^ Rosenbaum CC, O'Mathúna DP, Chavez M, Shields K (2010). "Antioxidants and antiinflammatory dietary supplements for osteoarthritis and rheumatoid arthritis". Altern Ther Health Med 16 (2): 32–40. PMID 20232616.
^ Crichton GE, Bryan J, Murphy KJ (September 2013). "Dietary antioxidants, cognitive function and dementia--a systematic review". Plant Foods Hum Nutr 68 (3): 279–92. doi:10.1007/s11130-013-0370-0. PMID 23881465.
^ Li FJ, Shen L, Ji HF (2012). "Dietary intakes of vitamin E, vitamin C, and β-carotene and risk of Alzheimer's disease: a meta-analysis". J. Alzheimers Dis. 31 (2): 253–8. doi:10.3233/JAD-2012-120349. PMID 22543848.
^ Harrison FE (2012). "A critical review of vitamin C for the prevention of age-related cognitive decline and Alzheimer's disease". J. Alzheimers Dis. 29 (4): 711–26. doi:10.3233/JAD-2012-111853. PMC 3727637. PMID 22366772.
^ Mathew MC, Ervin AM, Tao J, Davis RM (2012). "Routine Antioxidant vitamin supplementation for preventing and slowing the progression of age-related cataract". Cochrane Database Syst Rev 6: CD004567. doi:10.1002/14651858.CD004567.pub2. PMID 22696344.
^ Hemilä H (October 2007). "The role of vitamin C in the treatment of the common cold". Am Fam Physician 76 (8): 1111, 1115. PMID 17992770.
^ ^a ^b Douglas RM, Hemilä H, Chalker E, Treacy B (2007). Hemilä, Harri, ed. "Vitamin C for preventing and treating the common cold". Cochrane Database Syst Rev (3): CD000980. doi:10.1002/14651858.CD000980.pub3. PMID 17636648.
^ Heimer KA, Hart AM, Martin LG, Rubio-Wallace S (May 2009). "Examining the evidence for the use of vitamin C in the prophylaxis and treatment of the common cold". J Am Acad Nurse Pract 21 (5): 295–300. doi:10.1111/j.1745-7599.2009.00409.x. PMID 19432914.
^ Hemilä H, Chalker E (January 2013). "Vitamin C for preventing and treating the common cold". Cochrane Database of Systematic Reviews. doi:10.1002/14651858.CD000980.pub4.
^ ^a ^b Levine M, Rumsey SC, Wang Y, Park JB, Daruwala R (2000). "Vitamin C". In Stipanuk MH. Biochemical and physiological aspects of human nutrition. Philadelphia: W.B. Saunders. pp. 541–67. ISBN 0-7216-4452-X.
^ Prockop DJ, Kivirikko KI (1995). "Collagens: molecular biology, diseases, and potentials for therapy". Annu. Rev. Biochem. 64: 403–34. doi:10.1146/annurev.bi.64.070195.002155. PMID 7574488.
^ Peterkofsky B (December 1991). "Ascorbate requirement for hydroxylation and secretion of procollagen: relationship to inhibition of collagen synthesis in scurvy". Am. J. Clin. Nutr. 54 (6 Suppl): 1135S–1140S. PMID 1720597.
^ Kivirikko KI, Myllylä R (1985). "Post-translational processing of procollagens". Annals of the New York Academy of Sciences 460: 187–201. Bibcode:1985NYASA.460..187K. doi:10.1111/j.1749-6632.1985.tb51167.x. PMID 3008623.
^ Rebouche CJ (December 1991). "Ascorbic acid and carnitine biosynthesis". Am. J. Clin. Nutr. 54 (6 Suppl): 1147S–1152S. PMID 1962562.
^ Dunn WA, Rettura G, Seifter E, Englard S (September 1984). "Carnitine biosynthesis from gamma-butyrobetaine and from exogenous protein-bound 6-N-trimethyl-L-lysine by the perfused guinea pig liver. Effect of ascorbate deficiency on the in situ activity of gamma-butyrobetaine hydroxylase". J. Biol. Chem. 259 (17): 10764–70. PMID 6432788.
^ Levine M, Dhariwal KR, Washko P, Welch R, Wang YH, Cantilena CC, Yu R (1992). "Ascorbic acid and reaction kinetics in situ: a new approach to vitamin requirements". J. Nutr. Sci. Vitaminol. Spec No: 169–72. doi:10.3177/jnsv.38.Special_169. PMID 1297733.
^ Kaufman S (1974). "Dopamine-beta-hydroxylase". J Psychiatr Res 11: 303–16. doi:10.1016/0022-3956(74)90112-5. PMID 4461800.
^ Eipper BA, Milgram SL, Husten EJ, Yun HY, Mains RE (April 1993). "Peptidylglycine alpha-amidating monooxygenase: a multifunctional protein with catalytic, processing, and routing domains". Protein Sci. 2 (4): 489–97. doi:10.1002/pro.5560020401. PMC 2142366. PMID 8518727.
^ Eipper BA, Stoffers DA, Mains RE (1992). "The biosynthesis of neuropeptides: peptide alpha-amidation". Annu. Rev. Neurosci. 15: 57–85. doi:10.1146/annurev.ne.15.030192.000421. PMID 1575450.
^ Englard S, Seifter S (1986). "The biochemical functions of ascorbic acid". Annu. Rev. Nutr. 6: 365–406. doi:10.1146/annurev.nu.06.070186.002053. PMID 3015170.
^ Lindblad B, Lindstedt G, Lindstedt S (December 1970). "The mechanism of enzymic formation of homogentisate from p-hydroxyphenylpyruvate". J. Am. Chem. Soc. 92 (25): 7446–9. doi:10.1021/ja00728a032. PMID 5487549.
^ Preedy VR, Watson RR, Sherma Z (2010). Dietary Components and Immune Function (Nutrition and Health). Totowa, NJ: Humana Press. pp. 36; 52. ISBN 1-60761-060-4.
^ Smirnoff N (1996). "BOTANICAL BRIEFING: The Function and Metabolism of Ascorbic Acid in Plants". Annals of Botany 78 (6): 661–9. doi:10.1006/anbo.1996.0175.
^ ^a ^b ^c ^d Food and Nutrition Board, Institute of Medicine. "Dietary Reference Intakes (DRIs): Estimated Average Requirements" (PDF). United States National Academy of Sciences. Retrieved January 12, 2013.
^ Milton K (September 2003). "Micronutrient intakes of wild primates: are humans different?". Comp. Biochem. Physiol., Part a Mol. Integr. Physiol. 136 (1): 47–59. doi:10.1016/S1095-6433(03)00084-9. PMID 14527629.
^ "Linus Pauling Vindicated; Researchers Claim RDA For vitamin C is Flawed" (Press release). Knowledge of Health. July 6, 2004. Retrieved March 17, 2014.
^ World Health Organization (2004). "Chapter 7: Vitamin C". Vitamin and Mineral Requirements in Human Nutrition, Second Edition. Geneva: World Health Organization. ISBN 92-4-154612-3. Retrieved February 20, 2007.
^ "Commission Directive 2008/100/EC of 28 October 2008 amending Council Directive 90/496/EEC on nutrition labelling for foodstuffs as regards recommended daily allowances, energy conversion factors and definitions". The Commission of the European Communities.
^ "Vitamin C". Natural Health Product Monograph. Health Canada.
^ Shibata K, Fukuwatari T, Imai E, Hayakawa T, Watanabe F, Takimoto H, Watanabe T, Umegaki K (January 2012). "Dietary Reference Intakes for Japanese 2010: Water-Soluble Vitamins". Journal of Nutritional Science and Vitaminology 59 (Supplement): S67–S82. doi:10.3177/jnsv.59.S67.
^ Emadi-Konjin P, Verjee Z, Levin AV, Adeli K (2005). "Measurement of intracellular vitamin C levels in human lymphocytes by reverse phase high performance liquid chromatography (HPLC)" (PDF). Clinical Biochemistry 38 (5): 450–6. doi:10.1016/j.clinbiochem.2005.01.018. PMID 15820776. ^{[dead link]}
^ Yamada H, Yamada K, Waki M, Umegaki K (2004). "Lymphocyte and Plasma Vitamin C Levels in Type 2 Diabetic Patients With and Without Diabetes Complications" (PDF). Diabetes Care 27 (10): 2491–2. doi:10.2337/diacare.27.10.2491. PMID 15451922.
^ Pauling, Linus. (1976). Vitamin C, the Common Cold, and the Flu. San Francisco, CA: W.H. Freeman and Company.
^ "Toxicological evaluation of some food additives including anticaking agents, antimicrobials, antioxidants, emulsifiers and thickening agents". World Health Organization. July 4, 1973. Retrieved April 13, 2007.
^ Fleming DJ, Tucker KL, Jacques PF, Dallal GE, Wilson PW, Wood RJ (December 2002). "Dietary factors associated with the risk of high iron stores in the elderly Framingham Heart Study cohort". The American Journal of Clinical Nutrition 76 (6): 1375–84. PMID 12450906.
^ Cook JD, Reddy MB (January 2001). "Effect of ascorbic acid intake on nonheme-iron absorption from a complete diet". The American Journal of Clinical Nutrition 73 (1): 93–8. PMID 11124756.
^ Goodwin JS, Tangum MR (November 1998). "Battling quackery: attitudes about micronutrient supplements in American academic medicine". Archives of Internal Medicine 158 (20): 2187–91. doi:10.1001/archinte.158.20.2187. PMID 9818798.
^ Massey LK, Liebman M, Kynast-Gales SA (July 2005). "Ascorbate increases human oxaluria and kidney stone risk". The Journal of Nutrition 135 (7): 1673–7. PMID 15987848.
^ Thomas LD, Elinder CG, Tiselius HG, Wolk A, Akesson A (2013). "Ascorbic Acid Supplements and Kidney Stone Incidence Among Men: A Prospective Study". JAMA Intern Med. 173 (5): 1–2. doi:10.1001/jamainternmed.2013.2296. PMID 23381591.
^ Naidu KA (2003). "Vitamin C in human health and disease is still a mystery ? An overview" (PDF). J. Nutr. 2 (7): 7. doi:10.1186/1475-2891-2-7. PMC 201008. PMID 14498993.
^ Mashour S, Turner JF, Merrell R (August 2000). "Acute renal failure, oxalosis, and vitamin C supplementation: a case report and review of the literature". Chest 118 (2): 561–3. doi:10.1378/chest.118.2.561. PMID 10936161.
^ Ovcharov R, Todorov S (1974). "[The effect of vitamin C on the estrus cycle and embryogenesis of rats]". Akusherstvo I Ginekologii͡a (in Bulgarian) 13 (3): 191–5. PMID 4467736.
^ Vobecky JS, Vobecky J, Shapcott D, Cloutier D, Lafond R, Blanchard R (1976). "Vitamins C and E in spontaneous abortion". International Journal for Vitamin and Nutrition Research 46 (3): 291–6. PMID 988001.
^ Javert CT, Stander HJ (1943). "Plasma Vitamin C and Prothrombin Concentration in Pregnancy and in Threatened, Spontaneous, and Habitual Abortion". Surgery, Gynecology, and Obstetrics 76: 115–122.
^ Gomez-Cabrera MC, Domenech E, Romagnoli M, Arduini A, Borras C, Pallardo FV, Sastre J, Viña J (January 2008). "Oral administration of vitamin C decreases muscle mitochondrial biogenesis and hampers training-induced adaptations in endurance performance". The American Journal of Clinical Nutrition 87 (1): 142–9. PMID 18175748.
^ "Cancer-Causing Compound Can Be Triggered By Vitamin C". March 13, 2007. Retrieved December 26, 2009.
^ ^a ^b ^c "Safety (MSDS) data for ascorbic acid". Oxford University. October 9, 2005. Retrieved February 21, 2007.
^ Wilson JX (2005). "Regulation of vitamin C transport". Annu. Rev. Nutr. 25: 105–25. doi:10.1146/annurev.nutr.25.050304.092647. PMID 16011461.
^ "The vitamin and mineral content is stable". Danish Veterinary and Food Administration. Retrieved February 26, 2010. ^{[dead link]}
^ "National Nutrient Database". Nutrient Data Laboratory of the US Agricultural Research Service. Retrieved March 7, 2007. ^{[dead link]}
^ ^a ^b "Natural food-Fruit Vitamin C Content". The Natural Food Hub. Retrieved March 7, 2007.
^ "Using local foods".
^ Prior LD, Eamus D, Duff GA (1997). "Seasonal Trends in Carbon Assimilation, Stomatal Conductance, Pre-dawn Leaf Water Potential and Growth in Terminalia ferdinandiana, a Deciduous Tree of Northern Australian Savannas". Australian Journal of Botany 45 (1): 53–69. doi:10.1071/BT96065.
^ Brand JC, Rae C, McDonnell J, Lee A, Cherikoff V, Truswell AS (1987). "The nutritional composition of Australian aboriginal bushfoods. I". Food Technology in Australia 35 (6): 293–296.
^ Justi KC, Visentainer JV, Evelázio de Souza N, Matsushita M (December 2000). "Nutritional composition and vitamin C stability in stored camu-camu (Myrciaria dubia) pulp". Arch Latinoam Nutr 50 (4): 405–8. PMID 11464674.
^ Vendramini AL, Trugo LC (2000). "Chemical composition of acerola fruit (Malpighia punicifolia L.) at three stages of maturity". Food Chemistry 71 (2): 195–198. doi:10.1016/S0308-8146(00)00152-7.
^ Poole KE, Loveridge N, Barker PJ, Halsall DJ, Rose C, Reeve J, Warburton EA (January 2006). "Reduced vitamin D in acute stroke". Stroke 37 (1): 243–5. doi:10.1161/01.STR.0000195184.24297.c1. PMID 16322500.
^ "Nutrient data: Guavas, common, raw". National Nutrient Database for Standard Reference Release 25. United States Department of Agriculture.
^ "Nutrient data: Persimmons, native, raw". National Nutrient Database for Standard Reference Release 25. United States Department of Agriculture.
^ "Nutrient data: 'Tomatoes, red, ripe, raw, year round average". National Nutrient Database for Standard Reference Release 25. United States Department of Agriculture.
^ "09038, Avocados, raw, California". National Nutrient Database for Standard Reference, Release 26. United States Department of Agriculture, Agricultural Research Service. Retrieved August 14, 2014.
^ "Nutrient data: Onion". National Nutrient Database for Standard Reference Release 25. United States Department of Agriculture.
^ "Nutrient data: Horned melon (Kiwano)". National Nutrient Database for Standard Reference Release 25. United States Department of Agriculture.
^ Nutrient Data Laboratory (2010). "USDA National Nutrient Database for Standard Reference, Release 23". United States Department of Agriculture Research Service. Retrieved 2011.
^ Chatterjee, IB (1973). "Evolution and the Biosynthesis of Ascorbic Acid". Science 182 (4118): 1271–1272. Bibcode:1973Sci...182.1271C. doi:10.1126/science.182.4118.1271. PMID 4752221.
^ Stone, I (February 22, 2003). "Eight Decades of Scurvy. The Case History of a Misleading Dietary Hypothesis.". AscorbateWeb. Archived from the original on March 18, 2009.
^ Elwood, McCluskey. "Which Vertebrates Make Vitamin C?".
^ Clark S (January 8, 2007). "Comparing Milk: Human, Cow, Goat & Commercial Infant Formula". Washington State University. Archived from the original on January 29, 2007. Retrieved February 28, 2007.
^ Toutain PL, Béchu D, Hidiroglou M (November 1997). "Ascorbic acid disposition kinetics in the plasma and tissues of calves". Am. J. Physiol. 273 (5 Pt 2): R1585–97. PMID 9374798.
^ Mal G (2000). Indian Veterinary Journal 77: 695–6.
^ Roig MG, Rivera ZS, Kennedy JF (May 1995). "A model study on rate of degradation of L-ascorbic acid during processing using home-produced juice concentrates". Int J Food Sci Nutr 46 (2): 107–15. doi:10.3109/09637489509012538. PMID 7621082.
^ Allen MA, Burgess SG (1950). "The losses of ascorbic acid during the large-scale cooking of green vegetables by different methods". Br. J. Nutr. 4 (2–3): 95–100. doi:10.1079/BJN19500024. PMID 14801407.
^ Combs GF (2001). The Vitamins, Fundamental Aspects in Nutrition and Health (2nd ed.). San Diego, CA: Academic Press. pp. 245–272. ISBN 978-0-12-183492-0.
^ Miranda H (June 2, 2006). "Fresh-Cut Fruit May Keep Its Vitamins". WebMD. Retrieved February 25, 2007.
^ "The production of vitamin C" (PDF). Competition Commission. 2001. Retrieved February 20, 2007.
^ Starling S (June 26, 2008). "DSM vitamin plant gains green thumbs-up". Decision News Media SAS. Retrieved February 25, 2010.
^ "Vitamin C: Distruptions to Production in China to Maintain Firm Market". Flexnews. June 30, 2008. Retrieved February 25, 2010.
^ "Bizbites October 11". Global Times. October 11, 2010. Retrieved October 15, 2010.
^ U.S. courts confront China's involvement in price fixing Andrew Longstreth , Reuters, March 11, 2011. Accessed March 2011
^ Vitamin C Makers Can Be Sued by Buyers Acting as Group January 27, 2012, Bloomberg , Business Week. Accessed January 2012
^ ^a ^b "Addition of Vitamins and Minerals to Food, 2005". Health Canada. Retrieved February 25, 2010.
^ British Pharmacopoeia Commission Secretariat (2009). "Index, BP 2009". Retrieved February 4, 2010.
^ "Japanese Pharmacopoeia, Fifteenth Edition". 2006. Retrieved February 4, 2010.
^ "Jacques Cartier's Second Voyage - 1535 - Winter & Scurvy". Retrieved February 25, 2007.
^ Martini E (June 2002). "Jacques Cartier witnesses a treatment for scurvy". Vesalius 8 (1): 2–6. PMID 12422875.
^ John Woodall, The Surgions Mate … (London, England : Edward Griffin, 1617), p. 89. From page 89: "Succus Limonum, or juice of Lemons … [is] the most precious help that ever was discovered against the Scurvy[;] to be drunk at all times; … "
^ Armstrong A (1858). "Observation on Naval Hygiene and Scurvy, more particularly as the later appeared during the Polar Voyage". British and foreign medico-chirurgical review: or, Quarterly journal of practical medicine and surgery 22: 295–305.
^ Johann Friedrich Bachstrom, Observationes circa scorbutum [Observations on scurvy] (Leiden ("Lugdunum Batavorum"), Netherlands: Conrad Wishof, 1734) p. 16. From page 16: " … sed ex nostra causa optime explicatur, quae est absentia, carentia & abstinentia a vegetabilibus recentibus, … " ( … but [this misfortune] is explained very well by our [supposed] cause, which is the absence of, lack of, and abstinence from fresh vegetables, … )
^ Lamb J (February 17, 2011). "Captain Cook and the Scourge of Scurvy". British History in depth. BBC.
^ Lamb J (2001). Preserving the self in the south seas, 1680–1840. University of Chicago Press. p. 117. ISBN 0-226-46849-6.
^ Lind J (1753). A Treatise of the Scurvy. London: A. Millar. In the 1757 edition of his work, Lind discusses his experiment starting on page 149.
^ Singh S; Edzard Ernst (2008). Trick of Treatment: The Undeniable Facts about Alternative Medicine. WW Norton & Company. pp. 15–18. ISBN 978-0-393-06661-6.
^ Beaglehole JH, Cook JD, Edwards PR (1999). The journals of Captain Cook. Harmondsworth [Eng.]: Penguin. ISBN 0-14-043647-2.
^ Reeve J, Stevens DA (2006). "Cook's Voyages 1768–1780". Navy and the Nation: The Influence of the Navy on Modern Australia. Allen & Unwin Academic. p. 74. ISBN 1-74114-200-8.
^ Kuhnlein HV, Receveur O, Soueida R, Egeland GM (June 2004). "Arctic indigenous peoples experience the nutrition transition with changing dietary patterns and obesity". J. Nutr. 134 (6): 1447–53. PMID 15173410.
^ ^a ^b Zetterström R (May 2009). "Nobel Prize 1937 to Albert von Szent-Györgyi: identification of vitamin C as the anti-scorbutic factor". Acta Paediatr. 98 (5): 915–9. doi:10.1111/j.1651-2227.2009.01239.x. PMID 19239412.
^ Norum KR, Grav HJ (June 2002). "[Axel Holst and Theodor Frolich--pioneers in the combat of scurvy]". Tidsskr. Nor. Laegeforen. (in Norwegian) 122 (17): 1686–7. PMID 12555613.
^ Rosenfeld L (April 1997). "Vitamine--vitamin. The early years of discovery". Clin. Chem. 43 (4): 680–5. PMID 9105273.
^ ^a ^b Svirbely JL, Szent-Györgyi A; Waugh (1932). "The chemical nature of vitamin C". Biochem. J. 26 (3): 865–70. Bibcode:1932Sci....75..357K. doi:10.1126/science.75.1944.357-a. PMC 1260981. PMID 16744896.
^ Juhász-Nagy S (March 2002). "[Albert Szent-Györgyi--biography of a free genius]". Orv Hetil (in Hungarian) 143 (12): 611–4. PMID 11963399.
^ Kenéz J (December 1973). "[Eventful life of a scientist. 80th birthday of Nobel prize winner Albert Szent-Györgyi]". Munch Med Wochenschr (in German) 115 (51): 2324–6. PMID 4589872.
^ Szállási A (December 1974). "[2 interesting early articles by Albert Szent-Györgyi]". Orv Hetil (in Hungarian) 115 (52): 3118–9. PMID 4612454.
^ "The Albert Szent-Gyorgyi Papers: Szeged, 1931-1947: Vitamin C, Muscles, and WWII". Profiles in Science. United States National Library of Medicine.
^ "Pitt History - 1932: Charles Glen King". University of Pittsburgh. Retrieved February 21, 2007. "In recognition of this medical breakthrough, some scientists believe that King also deserved Nobel Prize recognition." ^{[dead link]}
^ Stacey M, Manners DJ (1978). "Edmund Langley Hirst. 1898-1975". Adv Carbohydr Chem Biochem. Advances in Carbohydrate Chemistry and Biochemistry 35: 1–29. doi:10.1016/S0065-2318(08)60217-6. ISBN 9780120072354. PMID 356548.
^ Boudrant J (May 1990). "Microbial processes for ascorbic acid biosynthesis: a review". Enzyme and Microbial Technology 12 (5): 322–9. doi:10.1016/0141-0229(90)90159-N. PMID 1366548.
^ Bremus C, Herrmann U, Bringer-Meyer S, Sahm H (June 2006). "The use of microorganisms in L-ascorbic acid production". J. Biotechnol. 124 (1): 196–205. doi:10.1016/j.jbiotec.2006.01.010. PMID 16516325.
^ Bächi B (2008). "[Natural or synthetic vitamin C? A new substance's precarious status behind the scenes of World War II]". NTM (in German) 16 (4): 445–70. doi:10.1007/s00048-008-0309-y. PMID 19579835.
^ Burns JJ, Evans C (December 1956). "The synthesis of L-ascorbic acid in the rat from D-glucuronolactone and L-gulonolactone". J. Biol. Chem. 223 (2): 897–905. PMID 13385237.
^ Burns JJ, Moltz A, Peyser P (December 1956). "Missing step in guinea pigs required for the biosynthesis of L-ascorbic acid". Science 124 (3232): 1148–9. Bibcode:1956Sci...124.1148B. doi:10.1126/science.124.3232.1148-a. PMID 13380431.
^ Henson DE, Block G, Levine M (April 1991). "Ascorbic acid: biologic functions and relation to cancer". J. Natl. Cancer Inst. 83 (8): 547–50. doi:10.1093/jnci/83.8.547. PMID 1672383.
^ Stephens T (February 17, 2011). "Let the chemical games begin!". Swiss Info. Swiss Broadcasting Corporation. Retrieved February 23, 2011.

External links

Vitamin C Fact Sheet from the U.S. National Institutes of Health
Vitamin C bound to proteins in the PDB
National Nutrient Database at USDA Website

UpToDate Contents

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

1. 水溶性ビタミンの概要 overview of water soluble vitamins
2. 疾患予防におけるビタミン補給 vitamin supplementation in disease prevention
3. 小児の栄養障害と関連した微量栄養素欠乏 micronutrient deficiencies associated with malnutrition in children
4. 冠動脈疾患における食物性抗酸化物質 nutritional antioxidants in coronary heart disease
5. 癌に対する補完代替療法 complementary and alternative therapies for cancer

English Journal

Preservation of mitochondrial functional integrity in mitochondria isolated from small cryopreserved mouse brain areas.

Valenti D, de Bari L, De Filippis B, Ricceri L, Vacca RA.SourceInstitute of Biomembranes and Bioenergetics, National Council of Research, 70126 Bari, Italy. Electronic address: d.valenti@ibbe.cnr.it.
Analytical biochemistry.Anal Biochem.2014 Jan 1;444:25-31. doi: 10.1016/j.ab.2013.08.030. Epub 2013 Sep 7.
Studies of mitochondrial bioenergetics in brain pathophysiology are often precluded by the need to isolate mitochondria immediately after tissue dissection from a large number of brain biopsies for comparative studies. Here we present a procedure of cryopreservation of small brain areas from which m
PMID 24018341

Effects of hot boning and moisture enhancement on the eating quality of cull cow beef.

Pivotto LM, Campbell CP, Swanson K, Mandell IB.SourceDepartment of Animal & Poultry Science, University of Guelph, Guelph, Ontario, Canada, N1G 2W1.
Meat science.Meat Sci.2014 Jan;96(1):237-46. doi: 10.1016/j.meatsci.2013.07.015. Epub 2013 Jul 17.
The effects of chilling method and moisture enhancement were examined for improving eating quality of semimembranosus (SM) and longissimus lumborum (LL) from 62 cull beef cows. Chilling method included hot boning muscles after 45 to 60min postmortem or conventional chilling for 24h. Moisture enhance
PMID 23916959

Combined effects of potassium lactate and calcium ascorbate as sodium chloride substitutes on the physicochemical and sensory characteristics of low-sodium frankfurter sausage.

Choi YM, Jung KC, Jo HM, Nam KW, Choe JH, Rhee MS, Kim BC.SourceDivision of Food Bioscience and Technology, College of Life Sciences and Biotechnology, Korea University, 5-1 Anam-dong, Sungbuk-gu, Seoul 136-713, South Korea.
Meat science.Meat Sci.2014 Jan;96(1):21-5. doi: 10.1016/j.meatsci.2013.06.022. Epub 2013 Jun 22.
The purpose of this study was to evaluate the combined effects of sodium chloride (NaCl) substitutes, including potassium lactate (K-lactate) and calcium ascorbate (Ca-ascorbate), on the physicochemical and sensory characteristics of low-sodium frankfurter sausage (1.2% content of NaCl). Sausages pr
PMID 23896133

Japanese Journal

Sensitive d-amino acid biosensor based on oxidase/peroxidase system mediated by pentacyanoferrate-bound polymer.

Nieh Chi-Hua,Kitazumi Yuki,Shirai Osamu,Kano Kenji
Biosensors & bioelectronics 47, 350-355, 2013-09-00
… Nafion and ascorbate oxidase-immobilized films worked successfully to prevent severe interference from uric acid and ascorbic acid. …
NAID 120005244941

Copper isotope fractionation between aqueous compounds relevant to low temperature geochemistry and biology

Fujii Toshiyuki,Moynier Frédéric,Abe Minori,Nemoto Keisuke,Albarède Francis
Geochimica et Cosmochimica Acta 110, 29-44, 2013-06-00
… Isotope fractionation between the common Cu species present in solution (Cu[+], Cu[2+], hydroxide, chloride, sulfide, carbonate, oxalate, and ascorbate) has been investigated using both ab initio methods and experimental solvent extraction techniques. … Further theoretical estimates of δ[65]Cu in hydrated Cu(I) and Cu(II) ions, Cu(II) ascorbates, and Cu(II) oxalate predict Cu isotope fractionation during the breakdown of ascorbate into oxalate and account for the isotopically heavy Cu found in animal kidneys. …
NAID 120005244426

Roles of conserved Arg^<72> and Tyr^<71> in the ascorbate-specific transmembrane electron transfer catalyzed by Zea mays cytochrome b_<561>(ENZYMOLOGY, PROTEIN ENGINEERING, AND ENZYME TECHNOLOGY)

Rahman Moriur Md.,Nakanishi Nobuyuki,Sakamoto Yoichi,Hori Hiroshi,Hase Toshiharu,Park Sam-Yong,Tsubaki Motonari
Journal of bioscience and bioengineering 115(5), 497-506, 2013-05-00
… on a cytosollc loop had important roles for ascorbate-binding and a succeeding electron transfer. … did not affect significantly on the final heme reduction level with ascorbate as reductant. … However, characteristic pH-dependent initial time-lag upon electron acceptance from ascorbate was completely lost for R72A and R72E mutants. … with ascorbate. …
NAID 110009611452

Related Pictures

★リンクテーブル★

リンク元	「ビタミンC」「AA」「アスコルビン酸塩」
拡張検索	「ferrous ascorbate」「ascorbate oxidase」「dehydroascorbate」

「ビタミンC」

Vitamin C
Systematic (IUPAC) name
	2-Oxo-L-threo-hexono-1,4-lactone-2,3-enediol; or; (R)-3,4-dihydroxy-5-((S)- 1,2-dihydroxyethyl)furan-2(5H)-one
Clinical data
AHFS/Drugs.com	Multum Consumer Information
Pregnancy cat.	A (to RDA), C (above RDA);
Legal status	AU: Unscheduled; US: OTC; general public availability;
Routes	oral
Pharmacokinetic data
Bioavailability	rapid & complete
Protein binding	negligible
Half-life	varies according to plasma concentration
Excretion	renal
Identifiers
CAS number	50-81-7
ATC code	A11G
PubChem	CID 5785
DrugBank	DB00126
ChemSpider	10189562
UNII	PQ6CK8PD0R
KEGG	D00018
ChEBI	CHEBI:29073
ChEMBL	CHEMBL196
NIAID ChemDB	002072
Synonyms	L-ascorbic acid
Chemical data
Formula	C6H8O6
Mol. mass	176.12 g/mole
	SMILES C([C@@H]([C@@H]1C(=C(C(=O)O1)O)O)O)O;
	InChI InChI=1S/C6H8O6/c7-1-2(8)5-3(9)4(10)6(11)12-5/h2,5,7-10H,1H2/t2-,5+/m0/s1 ; Key:CIWBSHSKHKDKBQ-JLAZNSOCSA-N ;
Physical data
Density	1.694 g/cm³
Melt. point	190 °C (374 °F)
Boiling point	553 °C (1027 °F)
(what is this?) (verify)

　　[★]

英: vitamin C
ラ: acidum ascorbicum、セビタミン酸 cevitamic acid
同: アスコルビン酸, ascorbic acid AsA, ascorbate, L-アスコルビン酸
商: ハイシー、アスコルチン、ビタシミン、アスコルビン酸、オフタルムK配合、シーピー配合、デラキシー配合、デルモランF、ビタミンC
関: ビタミン

first aid step1 2006 p.85,112,114,427

水溶性ビタミン

生理機能

コラーゲンのプロリン、リジンのヒドロキシル化 (HIM.445)
チロシン代謝 (HIM.445)
カテコールアミン生合成：necessary as a cofactor for dopamine → NE (HIM.445)
カルニチン生合成 (HIM.445)
多くのペプチドホルモンの合成 (HIM.445)
コレステロール代謝
鉄吸収の促進：鉄イオンをFe2+(還元状態)に保持することで吸収されやすくする。 (HIM.445)
抗酸化作用

スーパーオキシド(O2.-)、ヒドロキシルラジカル(OH.)、一重項酸素(1O2)などを消去

還元型ビタミンC + ラジカル → モノデヒドロアスコルビン酸　→
(２分子の不均化反応)モノデヒドロアスコルビン酸 → 還元型アスコルビン酸 + 酸化型アスコルビン酸
酸化型アスコルビン酸　+ GSH → 還元型アスコルビン酸

多くの薬物代謝酵素系のcomponent。特に、混合機能酸素添加酵素(mixed-function oxidase)系(チトクロムP450とか)。 (HIM.445)

臨床関連

壊血病 scurvy
尿糖偽陰性：ビタミンCの服用による

「AA」

　　[★]

「アスコルビン酸塩」

　　[★]

英: ascorbate
関: アスコルビン酸

「ferrous ascorbate」

　　[★]

アスコルビン酸第一鉄

関: ascorbic acid、L-ascorbic acid、vitamin C

「ascorbate oxidase」

　　[★]

アスコルビン酸酸化酵素、アスコルビン酸オキシダーゼ

「dehydroascorbate」

　　[★]

デヒドロアスコルビン酸

関: dehydroascorbic acid

[UKFSA_Risk-1] "Vitamin C". Food Standards Agency (UK). Retrieved February 19, 2007.

[Padayatty-2] Padayatty SJ, Katz A, Wang Y, Eck P, Kwon O, Lee JH, Chen S, Corpe C, Dutta A, Dutta SK, Levine M (February 2003). "Vitamin C as an antioxidant: evaluation of its role in disease prevention". J Am Coll Nutr 22 (1): 18–35. doi:10.1080/07315724.2003.10719272. PMID 12569111.

[Aboul-Enein_1999-3] Aboul-Enein HY, Al-Duraibi IA, Stefan RI, Radoi C, Avramescu A (1999). "Analysis of L- and D-ascorbic acid in fruits and fruit drinks by HPLC". Seminars in Food Analysis 4 (1): 31–37. Archived from the original on December 15, 2013.

[UMM-4] "Vitamin C". University of Maryland Medical Center. January 2007. Retrieved March 31, 2008.

[OSU-5] Higdon J (January 31, 2006). "Vitamin C". Oregon State University, Micronutrient Information Center. Retrieved March 7, 2007.

[pmid8144521-6] Meister A (April 1994). "Glutathione-ascorbic acid antioxidant system in animals". J. Biol. Chem. 269 (13): 9397–400. PMID 8144521.

[isbn1-4377-0959-1-7] Michels A, Frei B (2012). "Vitamin C". In Caudill MA, Rogers M. Biochemical, Physiological, and Molecular Aspects of Human Nutrition (3 ed.). Philadelphia: Saunders. pp. 627–654. ISBN 1-4377-0959-1.

[Gropper_2005-8] Gropper SS, Smith JL, Grodd JL (2005). Advanced nutrition and human metabolism. Belmont, CA: Thomson Wadsworth. pp. 260–275. ISBN 0-534-55986-7.

[pmid9620799-9] Wheeler GL, Jones MA, Smirnoff N (May 1998). "The biosynthetic pathway of vitamin C in higher plants". Nature 393 (6683): 365–9. Bibcode:1998Natur.393..365W. doi:10.1038/30728. PMID 9620799.

[pmid11458272-10] Bánhegyi G, Mándl J (2001). "The hepatic glycogenoreticular system". Pathol. Oncol. Res. 7 (2): 107–10. doi:10.1007/BF03032575. PMID 11458272.

[Martinez_del_Rio_1997-11] Martinez del Rio C (July 1997). "Can passerines synthesize vitamin C?". The Auk 114 (3): 513–16. doi:10.2307/4089257. JSTOR 4089257. Retrieved May 2, 2011.

[pmid22294879-12] Drouin G, Godin JR, Pagé B (2011). "The genetics of vitamin C loss in vertebrates". Curr. Genomics 12 (5): 371–8. doi:10.2174/138920211796429736. PMC 3145266. PMID 22294879.

[13] Jenness R, Birney E, Ayaz K (1980). "Variation of l-gulonolactone oxidase activity in placental mammals". Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology 67 (2): 195–204. doi:10.1016/0305-0491(80)90131-5.

[pmid21037206-14] Cui J, Pan YH, Zhang Y, Jones G, Zhang S (Feb 2011). "Progressive pseudogenization: vitamin C synthesis and its loss in bats". Mol. Biol. Evol. 28 (2): 1025–31. doi:10.1093/molbev/msq286. PMID 21037206.

[pmid22069493-15] Cui J, Yuan X, Wang L, Jones G, Zhang S (Nov 2011). "Recent loss of vitamin C biosynthesis ability in bats". PLoS ONE 6 (11): e27114. doi:10.1371/journal.pone.0027114. PMID 22069493.

[isbn0-306-45148-4-16] Harris JW (1996). Ascorbic acid: biochemistry and biomedical cell biology. New York: Plenum Press. p. 35. ISBN 0-306-45148-4.

[pmid1400507-17] Nishikimi M, Kawai T, Yagi K (October 1992). "Guinea pigs possess a highly mutated gene for L-gulono-gamma-lactone oxidase, the key enzyme for L-ascorbic acid biosynthesis missing in this species". J. Biol. Chem. 267 (30): 21967–72. PMID 1400507.

[pmid10572964-18] Ohta Y, Nishikimi M (October 1999). "Random nucleotide substitutions in primate nonfunctional gene for L-gulono-gamma-lactone oxidase, the missing enzyme in L-ascorbic acid biosynthesis". Biochim. Biophys. Acta 1472 (1–2): 408–11. doi:10.1016/S0304-4165(99)00123-3. PMID 10572964.

[pmid18358815-19] Montel-Hagen A, Kinet S, Manel N, Mongellaz C, Prohaska R, Battini JL, Delaunay J, Sitbon M, Taylor N (March 2008). "Erythrocyte Glut1 triggers dehydroascorbic acid uptake in mammals unable to synthesize vitamin C". Cell 132 (6): 1039–48. doi:10.1016/j.cell.2008.01.042. PMID 18358815. Lay summary – Science Daily (March 21, 2008).

[pmid10378206-20] Milton K (June 1999). "Nutritional characteristics of wild primate foods: do the diets of our closest living relatives have lessons for us?". Nutrition 15 (6): 488–98. doi:10.1016/S0899-9007(99)00078-7. PMID 10378206.

[yeastAA-21] Hancock RD, Viola R. "Ascorbic acid biosynthesis in higher plants and microorganisms" (PDF). Scottish Crop Research Institute. Retrieved February 20, 2007.

[pmid10802179-22] Hancock RD, Galpin JR, Viola R (May 2000). "Biosynthesis of L-ascorbic acid (vitamin C) by Saccharomyces cerevisiae". FEMS Microbiol. Lett. 186 (2): 245–50. doi:10.1111/j.1574-6968.2000.tb09112.x. PMID 10802179.

[Hardie_1991-23] Hardie LJ, Fletcher TC, Secombes CJ (1991). "The effect of dietary vitamin C on the immune response of the Atlantic salmon (Salmo salar L.)". Aquaculture 95 (3–4): 201–14. doi:10.1016/0044-8486(91)90087-N.

[pmid9655531-24] Challem JJ, Taylor EW (July 1998). "Retroviruses, ascorbate, and mutations, in the evolution of Homo sapiens". Free Radic. Biol. Med. 25 (1): 130–2. doi:10.1016/S0891-5849(98)00034-3. PMID 9655531.

[pmid9296457-25] Bánhegyi G, Braun L, Csala M, Puskás F, Mandl J (1997). "Ascorbate metabolism and its regulation in animals". Free Radic. Biol. Med. 23 (5): 793–803. doi:10.1016/S0891-5849(97)00062-2. PMID 9296457.

[pmid491997-26] Stone I (June 1979). "Homo sapiens ascorbicus, a biochemically corrected robust human mutant". Med. Hypotheses 5 (6): 711–21. doi:10.1016/0306-9877(79)90093-8. PMID 491997.

[pmid3113259-27] Pollock JI, Mullin RJ (May 1987). "Vitamin C biosynthesis in prosimians: evidence for the anthropoid affinity of Tarsius". Am. J. Phys. Anthropol. 73 (1): 65–70. doi:10.1002/ajpa.1330730106. PMID 3113259.

[pmid15085543-28] Poux C, Douzery EJ (May 2004). "Primate phylogeny, evolutionary rate variations, and divergence times: a contribution from the nuclear gene IRBP". Am. J. Phys. Anthropol. 124 (1): 1–16. doi:10.1002/ajpa.10322. PMID 15085543.

[pmid9668008-29] Goodman M, Porter CA, Czelusniak J, Page SL, Schneider H, Shoshani J, Gunnell G, Groves CP (June 1998). "Toward a phylogenetic classification of Primates based on DNA evidence complemented by fossil evidence". Mol. Phylogenet. Evol. 9 (3): 585–98. doi:10.1006/mpev.1998.0495. PMID 9668008.

[Porter_1997-30] Porter CA, Page SL, Czelusniak J, Schneider H, Schneider MPC, Sampaio I, Goodman M (January 1997). "Phylogeny and Evolution of Selected Primates as Determined by Sequences of the ε-Globin Locus and 5′ Flanking Regions". International Journal of Primatology 18 (2): 261–295. doi:10.1023/A:1026328804319.

[pmid5477017-31] Proctor P (November 1970). "Similar functions of uric acid and ascorbate in man?". Nature 228 (5274): 868. Bibcode:1970Natur.228..868P. doi:10.1038/228868a0. PMID 5477017.

[Savini_2008-32] Savini I, Rossi A, Pierro C, Avigliano L, Catani MV (April 2008). "SVCT1 and SVCT2: key proteins for vitamin C uptake". Amino Acids 34 (3): 347–55. doi:10.1007/s00726-007-0555-7. PMID 17541511.

[pmid9228080-33] Rumsey SC, Kwon O, Xu GW, Burant CF, Simpson I, Levine M (July 1997). "Glucose transporter isoforms GLUT1 and GLUT3 transport dehydroascorbic acid". J. Biol. Chem. 272 (30): 18982–9. doi:10.1074/jbc.272.30.18982. PMID 9228080.

[pmid12729925-34] May JM, Qu ZC, Neel DR, Li X (May 2003). "Recycling of vitamin C from its oxidized forms by human endothelial cells". Biochim. Biophys. Acta 1640 (2–3): 153–61. doi:10.1016/S0167-4889(03)00043-0. PMID 12729925.

[isbn0-8247-9313-7-35] Packer L (1997). "Vitamin C and redox cycling antioxidants". In Fuchs J, Packer L. Vitamin C in health and disease. New York: M. Dekker. ISBN 0-8247-9313-7. ^{[page needed]}

[pmid17586466-36] May JM, Qu ZC, Qiao H, Koury MJ (August 2007). "Maturational loss of the vitamin C transporter in erythrocytes". Biochem. Biophys. Res. Commun. 360 (1): 295–8. doi:10.1016/j.bbrc.2007.06.072. PMC 1964531. PMID 17586466.

[pmid11984597-37] Sotiriou S, Gispert S, Cheng J, Wang Y, Chen A, Hoogstraten-Miller S, Miller GF, Kwon O, Levine M, Guttentag SH, Nussbaum RL (May 2002). "Ascorbic-acid transporter Slc23a1 is essential for vitamin C transport into the brain and for perinatal survival". Nat. Med. 8 (5): 514–7. doi:10.1038/nm0502-514. PMID 11984597.

[pmid8623000-38] Levine M, Conry-Cantilena C, Wang Y, Welch RW, Washko PW, Dhariwal KR, Park JB, Lazarev A, Graumlich JF, King J, Cantilena LR (April 1996). "Vitamin C pharmacokinetics in healthy volunteers: evidence for a recommended dietary allowance". Proc. Natl. Acad. Sci. U.S.A. 93 (8): 3704–9. Bibcode:1996PNAS...93.3704L. doi:10.1073/pnas.93.8.3704. PMC 39676. PMID 8623000.

[pmid8263270-39] Oreopoulos DG, Lindeman RD, VanderJagt DJ, Tzamaloukas AH, Bhagavan HN, Garry PJ (October 1993). "Renal excretion of ascorbic acid: effect of age and sex". J Am Coll Nutr 12 (5): 537–42. doi:10.1080/07315724.1993.10718349. PMID 8263270.

[pmid11984580-40] Hediger MA (May 2002). "New view at C". Nat. Med. 8 (5): 445–6. doi:10.1038/nm0502-445. PMID 11984580.

[MedlinePlus-41] MedlinePlus Encyclopedia Ascorbic acid

[StatCdn-42] Statistics Canada, Canadian Community Health Survey, Cycle 2.2, Nutrition (2004)^{[dead link]}

[pmid16510534-43] Pemberton J (June 2006). "Medical experiments carried out in Sheffield on conscientious objectors to military service during the 1939-45 war". Int J Epidemiol 35 (3): 556–8. doi:10.1093/ije/dyl020. PMID 16510534.

[pmid4977512-44] Hodges RE, Baker EM, Hood J, Sauberlich HE, March SC (May 1969). "Experimental scurvy in man". Am. J. Clin. Nutr. 22 (5): 535–48. PMID 4977512.

[Stratton_J.2C_Godwin_M_243.E2.80.9352-45] Stratton J, Godwin M (June 2011). "The effect of supplemental vitamins and minerals on the development of prostate cancer: a systematic review and meta-analysis". Fam Pract 28 (3): 243–52. doi:10.1093/fampra/cmq115. PMID 21273283.

[46] Bjelakovic G, Nikolova D, Gluud LL, Simonetti RG, Gluud C (2012). "Antioxidant supplements for prevention of mortality in healthy participants and patients with various diseases". Cochrane Database Syst Rev 3: CD007176. doi:10.1002/14651858.CD007176.pub2. PMID 22419320.

[47] Cortés-Jofré M, Rueda JR, Corsini-Muñoz G, Fonseca-Cortés C, Caraballoso M, Bonfill Cosp X (2012). "Drugs for preventing lung cancer in healthy people". Cochrane Database Syst Rev 10: CD002141. doi:10.1002/14651858.CD002141.pub2. PMID 23076895.

[48] Luo, Jie; Shen, Li; Zheng, Di (22 August 2014). "Association between vitamin C intake and lung cancer: a dose-response meta-analysis". Scientific Reports 4: 6161. doi:10.1038/srep06161.

[49] Xu X, Yu E, Liu L, et al. (November 2013). "Dietary intake of vitamins A, C, and E and the risk of colorectal adenoma: a meta-analysis of observational studies". Eur. J. Cancer Prev. 22 (6): 529–39. doi:10.1097/CEJ.0b013e328364f1eb. PMID 24064545.

[50] Papaioannou D, Cooper KL, Carroll C, et al. (October 2011). "Antioxidants in the chemoprevention of colorectal cancer and colorectal adenomas in the general population: a systematic review and meta-analysis". Colorectal Dis 13 (10): 1085–99. doi:10.1111/j.1463-1318.2010.02289.x. PMID 20412095.

[51] Fulan H, Changxing J, Baina WY, et al. (October 2011). "Retinol, vitamins A, C, and E and breast cancer risk: a meta-analysis and meta-regression". Cancer Causes Control 22 (10): 1383–96. doi:10.1007/s10552-011-9811-y. PMID 21761132.

[52] Harris HR, Orsini N, Wolk A (May 2014). "Vitamin C and survival among women with breast cancer: a meta-analysis". Eur. J. Cancer 50 (7): 1223–31. doi:10.1016/j.ejca.2014.02.013. PMID 24613622.

[53] Ye Y, Li J, Yuan Z (2013). "Effect of antioxidant vitamin supplementation on cardiovascular outcomes: a meta-analysis of randomized controlled trials". PLoS ONE 8 (2): e56803. doi:10.1371/journal.pone.0056803. PMC 3577664. PMID 23437244.

[54] Chen GC, Lu DB, Pang Z, Liu QF (2013). "Vitamin C intake, circulating vitamin C and risk of stroke: a meta-analysis of prospective studies". J Am Heart Assoc 2 (6): e000329. doi:10.1161/JAHA.113.000329. PMC 3886767. PMID 24284213.

[55] Effect of vitamin C on endothelial function in health and disease: A systematic review and meta-analysis of randomised controlled trials Atherosclerosis Volume 235, Issue 1, Pages 9–20, July 2014. Published April 16, 2014. Accessed June 25, 2014.

[56] Rosenbaum CC, O'Mathúna DP, Chavez M, Shields K (2010). "Antioxidants and antiinflammatory dietary supplements for osteoarthritis and rheumatoid arthritis". Altern Ther Health Med 16 (2): 32–40. PMID 20232616.

[57] Crichton GE, Bryan J, Murphy KJ (September 2013). "Dietary antioxidants, cognitive function and dementia--a systematic review". Plant Foods Hum Nutr 68 (3): 279–92. doi:10.1007/s11130-013-0370-0. PMID 23881465.

[58] Li FJ, Shen L, Ji HF (2012). "Dietary intakes of vitamin E, vitamin C, and β-carotene and risk of Alzheimer's disease: a meta-analysis". J. Alzheimers Dis. 31 (2): 253–8. doi:10.3233/JAD-2012-120349. PMID 22543848.

[59] Harrison FE (2012). "A critical review of vitamin C for the prevention of age-related cognitive decline and Alzheimer's disease". J. Alzheimers Dis. 29 (4): 711–26. doi:10.3233/JAD-2012-111853. PMC 3727637. PMID 22366772.

[60] Mathew MC, Ervin AM, Tao J, Davis RM (2012). "Routine Antioxidant vitamin supplementation for preventing and slowing the progression of age-related cataract". Cochrane Database Syst Rev 6: CD004567. doi:10.1002/14651858.CD004567.pub2. PMID 22696344.

[pmid17992770-61] Hemilä H (October 2007). "The role of vitamin C in the treatment of the common cold". Am Fam Physician 76 (8): 1111, 1115. PMID 17992770.

[Hemil.C3.A4_2010-62] Douglas RM, Hemilä H, Chalker E, Treacy B (2007). Hemilä, Harri, ed. "Vitamin C for preventing and treating the common cold". Cochrane Database Syst Rev (3): CD000980. doi:10.1002/14651858.CD000980.pub3. PMID 17636648.

[Heimer_2009-63] Heimer KA, Hart AM, Martin LG, Rubio-Wallace S (May 2009). "Examining the evidence for the use of vitamin C in the prophylaxis and treatment of the common cold". J Am Acad Nurse Pract 21 (5): 295–300. doi:10.1111/j.1745-7599.2009.00409.x. PMID 19432914.

[64] Hemilä H, Chalker E (January 2013). "Vitamin C for preventing and treating the common cold". Cochrane Database of Systematic Reviews. doi:10.1002/14651858.CD000980.pub4.

[LevineM-65] Levine M, Rumsey SC, Wang Y, Park JB, Daruwala R (2000). "Vitamin C". In Stipanuk MH. Biochemical and physiological aspects of human nutrition. Philadelphia: W.B. Saunders. pp. 541–67. ISBN 0-7216-4452-X.

[pmid7574488-66] Prockop DJ, Kivirikko KI (1995). "Collagens: molecular biology, diseases, and potentials for therapy". Annu. Rev. Biochem. 64: 403–34. doi:10.1146/annurev.bi.64.070195.002155. PMID 7574488.

[pmid1720597-67] Peterkofsky B (December 1991). "Ascorbate requirement for hydroxylation and secretion of procollagen: relationship to inhibition of collagen synthesis in scurvy". Am. J. Clin. Nutr. 54 (6 Suppl): 1135S–1140S. PMID 1720597.

[pmid3008623-68] Kivirikko KI, Myllylä R (1985). "Post-translational processing of procollagens". Annals of the New York Academy of Sciences 460: 187–201. Bibcode:1985NYASA.460..187K. doi:10.1111/j.1749-6632.1985.tb51167.x. PMID 3008623.

[Ascorbicacidcarnitine-69] Rebouche CJ (December 1991). "Ascorbic acid and carnitine biosynthesis". Am. J. Clin. Nutr. 54 (6 Suppl): 1147S–1152S. PMID 1962562.

[Carnitinebiosynthesis-70] Dunn WA, Rettura G, Seifter E, Englard S (September 1984). "Carnitine biosynthesis from gamma-butyrobetaine and from exogenous protein-bound 6-N-trimethyl-L-lysine by the perfused guinea pig liver. Effect of ascorbate deficiency on the in situ activity of gamma-butyrobetaine hydroxylase". J. Biol. Chem. 259 (17): 10764–70. PMID 6432788.

[pmid1297733-71] Levine M, Dhariwal KR, Washko P, Welch R, Wang YH, Cantilena CC, Yu R (1992). "Ascorbic acid and reaction kinetics in situ: a new approach to vitamin requirements". J. Nutr. Sci. Vitaminol. Spec No: 169–72. doi:10.3177/jnsv.38.Special_169. PMID 1297733.

[pmid4461800-72] Kaufman S (1974). "Dopamine-beta-hydroxylase". J Psychiatr Res 11: 303–16. doi:10.1016/0022-3956(74)90112-5. PMID 4461800.

[pmid8518727-73] Eipper BA, Milgram SL, Husten EJ, Yun HY, Mains RE (April 1993). "Peptidylglycine alpha-amidating monooxygenase: a multifunctional protein with catalytic, processing, and routing domains". Protein Sci. 2 (4): 489–97. doi:10.1002/pro.5560020401. PMC 2142366. PMID 8518727.

[pmid1575450-74] Eipper BA, Stoffers DA, Mains RE (1992). "The biosynthesis of neuropeptides: peptide alpha-amidation". Annu. Rev. Neurosci. 15: 57–85. doi:10.1146/annurev.ne.15.030192.000421. PMID 1575450.

[pmid3015170-75] Englard S, Seifter S (1986). "The biochemical functions of ascorbic acid". Annu. Rev. Nutr. 6: 365–406. doi:10.1146/annurev.nu.06.070186.002053. PMID 3015170.

[pmid5487549-76] Lindblad B, Lindstedt G, Lindstedt S (December 1970). "The mechanism of enzymic formation of homogentisate from p-hydroxyphenylpyruvate". J. Am. Chem. Soc. 92 (25): 7446–9. doi:10.1021/ja00728a032. PMID 5487549.

[Preedy-77] Preedy VR, Watson RR, Sherma Z (2010). Dietary Components and Immune Function (Nutrition and Health). Totowa, NJ: Humana Press. pp. 36; 52. ISBN 1-60761-060-4.

[78] Smirnoff N (1996). "BOTANICAL BRIEFING: The Function and Metabolism of Ascorbic Acid in Plants". Annals of Botany 78 (6): 661–9. doi:10.1006/anbo.1996.0175.

[US_RDA-79] Food and Nutrition Board, Institute of Medicine. "Dietary Reference Intakes (DRIs): Estimated Average Requirements" (PDF). United States National Academy of Sciences. Retrieved January 12, 2013.

[pmid14527629-80] Milton K (September 2003). "Micronutrient intakes of wild primates: are humans different?". Comp. Biochem. Physiol., Part a Mol. Integr. Physiol. 136 (1): 47–59. doi:10.1016/S1095-6433(03)00084-9. PMID 14527629.

[PR_Newswire-81] "Linus Pauling Vindicated; Researchers Claim RDA For vitamin C is Flawed" (Press release). Knowledge of Health. July 6, 2004. Retrieved March 17, 2014.

[isbn92-4-154612-3-82] World Health Organization (2004). "Chapter 7: Vitamin C". Vitamin and Mineral Requirements in Human Nutrition, Second Edition. Geneva: World Health Organization. ISBN 92-4-154612-3. Retrieved February 20, 2007.

[EU_RDA-83] "Commission Directive 2008/100/EC of 28 October 2008 amending Council Directive 90/496/EEC on nutrition labelling for foodstuffs as regards recommended daily allowances, energy conversion factors and definitions". The Commission of the European Communities.

[urlNatural_Health_Product_Monograph_-_Vitamin_C_.5BHealth_Canada.2C_2007.5D-84] "Vitamin C". Natural Health Product Monograph. Health Canada.

[85] Shibata K, Fukuwatari T, Imai E, Hayakawa T, Watanabe F, Takimoto H, Watanabe T, Umegaki K (January 2012). "Dietary Reference Intakes for Japanese 2010: Water-Soluble Vitamins". Journal of Nutritional Science and Vitaminology 59 (Supplement): S67–S82. doi:10.3177/jnsv.59.S67.

[86] Emadi-Konjin P, Verjee Z, Levin AV, Adeli K (2005). "Measurement of intracellular vitamin C levels in human lymphocytes by reverse phase high performance liquid chromatography (HPLC)" (PDF). Clinical Biochemistry 38 (5): 450–6. doi:10.1016/j.clinbiochem.2005.01.018. PMID 15820776. ^{[dead link]}

[87] Yamada H, Yamada K, Waki M, Umegaki K (2004). "Lymphocyte and Plasma Vitamin C Levels in Type 2 Diabetic Patients With and Without Diabetes Complications" (PDF). Diabetes Care 27 (10): 2491–2. doi:10.2337/diacare.27.10.2491. PMID 15451922.

[88] Pauling, Linus. (1976). Vitamin C, the Common Cold, and the Flu. San Francisco, CA: W.H. Freeman and Company.

[89] "Toxicological evaluation of some food additives including anticaking agents, antimicrobials, antioxidants, emulsifiers and thickening agents". World Health Organization. July 4, 1973. Retrieved April 13, 2007.

[pmid12450906-90] Fleming DJ, Tucker KL, Jacques PF, Dallal GE, Wilson PW, Wood RJ (December 2002). "Dietary factors associated with the risk of high iron stores in the elderly Framingham Heart Study cohort". The American Journal of Clinical Nutrition 76 (6): 1375–84. PMID 12450906.

[pmid11124756-91] Cook JD, Reddy MB (January 2001). "Effect of ascorbic acid intake on nonheme-iron absorption from a complete diet". The American Journal of Clinical Nutrition 73 (1): 93–8. PMID 11124756.

[BattlingQuackery-92] Goodwin JS, Tangum MR (November 1998). "Battling quackery: attitudes about micronutrient supplements in American academic medicine". Archives of Internal Medicine 158 (20): 2187–91. doi:10.1001/archinte.158.20.2187. PMID 9818798.

[pmid15987848-93] Massey LK, Liebman M, Kynast-Gales SA (July 2005). "Ascorbate increases human oxaluria and kidney stone risk". The Journal of Nutrition 135 (7): 1673–7. PMID 15987848.

[94] Thomas LD, Elinder CG, Tiselius HG, Wolk A, Akesson A (2013). "Ascorbic Acid Supplements and Kidney Stone Incidence Among Men: A Prospective Study". JAMA Intern Med. 173 (5): 1–2. doi:10.1001/jamainternmed.2013.2296. PMID 23381591.

[VCreview2003-95] Naidu KA (2003). "Vitamin C in human health and disease is still a mystery ? An overview" (PDF). J. Nutr. 2 (7): 7. doi:10.1186/1475-2891-2-7. PMC 201008. PMID 14498993.

[96] Mashour S, Turner JF, Merrell R (August 2000). "Acute renal failure, oxalosis, and vitamin C supplementation: a case report and review of the literature". Chest 118 (2): 561–3. doi:10.1378/chest.118.2.561. PMID 10936161.

[pmid4467736-97] Ovcharov R, Todorov S (1974). "[The effect of vitamin C on the estrus cycle and embryogenesis of rats]". Akusherstvo I Ginekologii͡a (in Bulgarian) 13 (3): 191–5. PMID 4467736.

[pmid988001-98] Vobecky JS, Vobecky J, Shapcott D, Cloutier D, Lafond R, Blanchard R (1976). "Vitamins C and E in spontaneous abortion". International Journal for Vitamin and Nutrition Research 46 (3): 291–6. PMID 988001.

[99] Javert CT, Stander HJ (1943). "Plasma Vitamin C and Prothrombin Concentration in Pregnancy and in Threatened, Spontaneous, and Habitual Abortion". Surgery, Gynecology, and Obstetrics 76: 115–122.

[mitochondria-100] Gomez-Cabrera MC, Domenech E, Romagnoli M, Arduini A, Borras C, Pallardo FV, Sastre J, Viña J (January 2008). "Oral administration of vitamin C decreases muscle mitochondrial biogenesis and hampers training-induced adaptations in endurance performance". The American Journal of Clinical Nutrition 87 (1): 142–9. PMID 18175748.

[chromium6-101] "Cancer-Causing Compound Can Be Triggered By Vitamin C". March 13, 2007. Retrieved December 26, 2009.

[Oxford-102] "Safety (MSDS) data for ascorbic acid". Oxford University. October 9, 2005. Retrieved February 21, 2007.

[103] Wilson JX (2005). "Regulation of vitamin C transport". Annu. Rev. Nutr. 25: 105–25. doi:10.1146/annurev.nutr.25.050304.092647. PMID 16011461.

[104] "The vitamin and mineral content is stable". Danish Veterinary and Food Administration. Retrieved February 26, 2010. ^{[dead link]}

[105] "National Nutrient Database". Nutrient Data Laboratory of the US Agricultural Research Service. Retrieved March 7, 2007. ^{[dead link]}

[natural-vit-c-106] "Natural food-Fruit Vitamin C Content". The Natural Food Hub. Retrieved March 7, 2007.

[107] "Using local foods".

[108] Prior LD, Eamus D, Duff GA (1997). "Seasonal Trends in Carbon Assimilation, Stomatal Conductance, Pre-dawn Leaf Water Potential and Growth in Terminalia ferdinandiana, a Deciduous Tree of Northern Australian Savannas". Australian Journal of Botany 45 (1): 53–69. doi:10.1071/BT96065.

[109] Brand JC, Rae C, McDonnell J, Lee A, Cherikoff V, Truswell AS (1987). "The nutritional composition of Australian aboriginal bushfoods. I". Food Technology in Australia 35 (6): 293–296.

[pmid11464674-110] Justi KC, Visentainer JV, Evelázio de Souza N, Matsushita M (December 2000). "Nutritional composition and vitamin C stability in stored camu-camu (Myrciaria dubia) pulp". Arch Latinoam Nutr 50 (4): 405–8. PMID 11464674.

[111] Vendramini AL, Trugo LC (2000). "Chemical composition of acerola fruit (Malpighia punicifolia L.) at three stages of maturity". Food Chemistry 71 (2): 195–198. doi:10.1016/S0308-8146(00)00152-7.

[pmid16322500-112] Poole KE, Loveridge N, Barker PJ, Halsall DJ, Rose C, Reeve J, Warburton EA (January 2006). "Reduced vitamin D in acute stroke". Stroke 37 (1): 243–5. doi:10.1161/01.STR.0000195184.24297.c1. PMID 16322500.

[USDA_Guavas-113] "Nutrient data: Guavas, common, raw". National Nutrient Database for Standard Reference Release 25. United States Department of Agriculture.

[USDA_Persimmons-114] "Nutrient data: Persimmons, native, raw". National Nutrient Database for Standard Reference Release 25. United States Department of Agriculture.

[USDA_Tomato-115] "Nutrient data: 'Tomatoes, red, ripe, raw, year round average". National Nutrient Database for Standard Reference Release 25. United States Department of Agriculture.

[-116] "09038, Avocados, raw, California". National Nutrient Database for Standard Reference, Release 26. United States Department of Agriculture, Agricultural Research Service. Retrieved August 14, 2014.

[USDA_Onions-117] "Nutrient data: Onion". National Nutrient Database for Standard Reference Release 25. United States Department of Agriculture.

[118] "Nutrient data: Horned melon (Kiwano)". National Nutrient Database for Standard Reference Release 25. United States Department of Agriculture.

[119] Nutrient Data Laboratory (2010). "USDA National Nutrient Database for Standard Reference, Release 23". United States Department of Agriculture Research Service. Retrieved 2011.

[Chatterjee_IB-120] Chatterjee, IB (1973). "Evolution and the Biosynthesis of Ascorbic Acid". Science 182 (4118): 1271–1272. Bibcode:1973Sci...182.1271C. doi:10.1126/science.182.4118.1271. PMID 4752221.

[121] Stone, I (February 22, 2003). "Eight Decades of Scurvy. The Case History of a Misleading Dietary Hypothesis.". AscorbateWeb. Archived from the original on March 18, 2009.

[122] Elwood, McCluskey. "Which Vertebrates Make Vitamin C?".

[123] Clark S (January 8, 2007). "Comparing Milk: Human, Cow, Goat & Commercial Infant Formula". Washington State University. Archived from the original on January 29, 2007. Retrieved February 28, 2007.

[pmid9374798-124] Toutain PL, Béchu D, Hidiroglou M (November 1997). "Ascorbic acid disposition kinetics in the plasma and tissues of calves". Am. J. Physiol. 273 (5 Pt 2): R1585–97. PMID 9374798.

[Mal_2000-125] Mal G (2000). Indian Veterinary Journal 77: 695–6.

[pmid7621082-126] Roig MG, Rivera ZS, Kennedy JF (May 1995). "A model study on rate of degradation of L-ascorbic acid during processing using home-produced juice concentrates". Int J Food Sci Nutr 46 (2): 107–15. doi:10.3109/09637489509012538. PMID 7621082.

[pmid14801407-127] Allen MA, Burgess SG (1950). "The losses of ascorbic acid during the large-scale cooking of green vegetables by different methods". Br. J. Nutr. 4 (2–3): 95–100. doi:10.1079/BJN19500024. PMID 14801407.

[Combs-128] Combs GF (2001). The Vitamins, Fundamental Aspects in Nutrition and Health (2nd ed.). San Diego, CA: Academic Press. pp. 245–272. ISBN 978-0-12-183492-0.

[129] Miranda H (June 2, 2006). "Fresh-Cut Fruit May Keep Its Vitamins". WebMD. Retrieved February 25, 2007.

[130] "The production of vitamin C" (PDF). Competition Commission. 2001. Retrieved February 20, 2007.

[131] Starling S (June 26, 2008). "DSM vitamin plant gains green thumbs-up". Decision News Media SAS. Retrieved February 25, 2010.

[132] "Vitamin C: Distruptions to Production in China to Maintain Firm Market". Flexnews. June 30, 2008. Retrieved February 25, 2010.

[133] "Bizbites October 11". Global Times. October 11, 2010. Retrieved October 15, 2010.

[134] U.S. courts confront China's involvement in price fixing Andrew Longstreth , Reuters, March 11, 2011. Accessed March 2011

[135] Vitamin C Makers Can Be Sued by Buyers Acting as Group January 27, 2012, Bloomberg , Business Week. Accessed January 2012

[Can05-136] "Addition of Vitamins and Minerals to Food, 2005". Health Canada. Retrieved February 25, 2010.

[ib29-137] British Pharmacopoeia Commission Secretariat (2009). "Index, BP 2009". Retrieved February 4, 2010.

[jp15-138] "Japanese Pharmacopoeia, Fifteenth Edition". 2006. Retrieved February 4, 2010.

[139] "Jacques Cartier's Second Voyage - 1535 - Winter & Scurvy". Retrieved February 25, 2007.

[pmid12422875-140] Martini E (June 2002). "Jacques Cartier witnesses a treatment for scurvy". Vesalius 8 (1): 2–6. PMID 12422875.

[141] John Woodall, The Surgions Mate … (London, England : Edward Griffin, 1617), p. 89. From page 89: "Succus Limonum, or juice of Lemons … [is] the most precious help that ever was discovered against the Scurvy[;] to be drunk at all times; … "

[142] Armstrong A (1858). "Observation on Naval Hygiene and Scurvy, more particularly as the later appeared during the Polar Voyage". British and foreign medico-chirurgical review: or, Quarterly journal of practical medicine and surgery 22: 295–305.

[143] Johann Friedrich Bachstrom, Observationes circa scorbutum [Observations on scurvy] (Leiden ("Lugdunum Batavorum"), Netherlands: Conrad Wishof, 1734) p. 16. From page 16: " … sed ex nostra causa optime explicatur, quae est absentia, carentia & abstinentia a vegetabilibus recentibus, … " ( … but [this misfortune] is explained very well by our [supposed] cause, which is the absence of, lack of, and abstinence from fresh vegetables, … )

[url_BBC_Captain_Cook_Scurvy-144] Lamb J (February 17, 2011). "Captain Cook and the Scourge of Scurvy". British History in depth. BBC.

[145] Lamb J (2001). Preserving the self in the south seas, 1680–1840. University of Chicago Press. p. 117. ISBN 0-226-46849-6.

[lind_james-146] Lind J (1753). A Treatise of the Scurvy. London: A. Millar. In the 1757 edition of his work, Lind discusses his experiment starting on page 149.

[Singh2008-147] Singh S; Edzard Ernst (2008). Trick of Treatment: The Undeniable Facts about Alternative Medicine. WW Norton & Company. pp. 15–18. ISBN 978-0-393-06661-6.

[isbn0-14-043647-2-148] Beaglehole JH, Cook JD, Edwards PR (1999). The journals of Captain Cook. Harmondsworth [Eng.]: Penguin. ISBN 0-14-043647-2.

[isbn1-74114-200-8-149] Reeve J, Stevens DA (2006). "Cook's Voyages 1768–1780". Navy and the Nation: The Influence of the Navy on Modern Australia. Allen & Unwin Academic. p. 74. ISBN 1-74114-200-8.

[pmid15173410-150] Kuhnlein HV, Receveur O, Soueida R, Egeland GM (June 2004). "Arctic indigenous peoples experience the nutrition transition with changing dietary patterns and obesity". J. Nutr. 134 (6): 1447–53. PMID 15173410.

[pmid19239412-151] Zetterström R (May 2009). "Nobel Prize 1937 to Albert von Szent-Györgyi: identification of vitamin C as the anti-scorbutic factor". Acta Paediatr. 98 (5): 915–9. doi:10.1111/j.1651-2227.2009.01239.x. PMID 19239412.

[pmid12555613-152] Norum KR, Grav HJ (June 2002). "[Axel Holst and Theodor Frolich--pioneers in the combat of scurvy]". Tidsskr. Nor. Laegeforen. (in Norwegian) 122 (17): 1686–7. PMID 12555613.

[pmid9105273-153] Rosenfeld L (April 1997). "Vitamine--vitamin. The early years of discovery". Clin. Chem. 43 (4): 680–5. PMID 9105273.

[pmid16744896-154] Svirbely JL, Szent-Györgyi A; Waugh (1932). "The chemical nature of vitamin C". Biochem. J. 26 (3): 865–70. Bibcode:1932Sci....75..357K. doi:10.1126/science.75.1944.357-a. PMC 1260981. PMID 16744896.

[pmid11963399-155] Juhász-Nagy S (March 2002). "[Albert Szent-Györgyi--biography of a free genius]". Orv Hetil (in Hungarian) 143 (12): 611–4. PMID 11963399.

[pmid4589872-156] Kenéz J (December 1973). "[Eventful life of a scientist. 80th birthday of Nobel prize winner Albert Szent-Györgyi]". Munch Med Wochenschr (in German) 115 (51): 2324–6. PMID 4589872.

[pmid4612454-157] Szállási A (December 1974). "[2 interesting early articles by Albert Szent-Györgyi]". Orv Hetil (in Hungarian) 115 (52): 3118–9. PMID 4612454.

[url_NLM_Profiles_Szent-Gyorgyi-158] "The Albert Szent-Gyorgyi Papers: Szeged, 1931-1947: Vitamin C, Muscles, and WWII". Profiles in Science. United States National Library of Medicine.

[159] "Pitt History - 1932: Charles Glen King". University of Pittsburgh. Retrieved February 21, 2007. "In recognition of this medical breakthrough, some scientists believe that King also deserved Nobel Prize recognition." ^{[dead link]}

[pmid356548-160] Stacey M, Manners DJ (1978). "Edmund Langley Hirst. 1898-1975". Adv Carbohydr Chem Biochem. Advances in Carbohydrate Chemistry and Biochemistry 35: 1–29. doi:10.1016/S0065-2318(08)60217-6. ISBN 9780120072354. PMID 356548.

[pmid1366548-161] Boudrant J (May 1990). "Microbial processes for ascorbic acid biosynthesis: a review". Enzyme and Microbial Technology 12 (5): 322–9. doi:10.1016/0141-0229(90)90159-N. PMID 1366548.

[pmid16516325-162] Bremus C, Herrmann U, Bringer-Meyer S, Sahm H (June 2006). "The use of microorganisms in L-ascorbic acid production". J. Biotechnol. 124 (1): 196–205. doi:10.1016/j.jbiotec.2006.01.010. PMID 16516325.

[pmid19579835-163] Bächi B (2008). "[Natural or synthetic vitamin C? A new substance's precarious status behind the scenes of World War II]". NTM (in German) 16 (4): 445–70. doi:10.1007/s00048-008-0309-y. PMID 19579835.

[pmid13385237-164] Burns JJ, Evans C (December 1956). "The synthesis of L-ascorbic acid in the rat from D-glucuronolactone and L-gulonolactone". J. Biol. Chem. 223 (2): 897–905. PMID 13385237.

[pmid13380431-165] Burns JJ, Moltz A, Peyser P (December 1956). "Missing step in guinea pigs required for the biosynthesis of L-ascorbic acid". Science 124 (3232): 1148–9. Bibcode:1956Sci...124.1148B. doi:10.1126/science.124.3232.1148-a. PMID 13380431.

[pmid1672383-166] Henson DE, Block G, Levine M (April 1991). "Ascorbic acid: biologic functions and relation to cancer". J. Natl. Cancer Inst. 83 (8): 547–50. doi:10.1093/jnci/83.8.547. PMID 1672383.

[swissinfo-167] Stephens T (February 17, 2011). "Let the chemical games begin!". Swiss Info. Swiss Broadcasting Corporation. Retrieved February 23, 2011.

匿名

検索

案内

ascorbate