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Journal ArticleDOI

New concepts in the biology and biochemistry of ascorbic acid.

Mark Levine
- 03 Apr 1986 - 
- Vol. 314, Iss: 14, pp 892-902
TLDR
It was not until 1753 that a Scottish physician, James Lind, systematically described scurvy and its prevention by dietary means, and for four decades the British navy refused to accept Lind's findings, and countless sailors continued to die unnecessarily from scurvard until lemon juice was finally included in sailors' rations.
Abstract
ASCORBIC acid, originally called vitamin C, is required for human health.1 In human beings deprived of ascorbic acid, the deficiency disease scurvy develops and can be life threatening. Although a disease remarkably similar to scurvy was described by the ancient Egyptians,2 , 3 it was not until 1753 that a Scottish physician, James Lind, systematically described scurvy and its prevention by dietary means.4 Even then, the dietary requirements were controversial. For four decades the British navy refused to accept Lind's findings, and countless sailors continued to die unnecessarily from scurvy until lemon juice was finally included in sailors' rations. Research since Lind's . . .

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Citations
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Tissue Destruction by Neutrophils

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Antioxidants in health and disease

TL;DR: The basic chemistry of freeradical formation in the body, the consequences of free radical induced tissue damage, and the function of antioxidant defence systems are reviewed, with particular reference to the development of atherosclerosis.
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Ascorbate is an outstanding antioxidant in human blood plasma.

TL;DR: The data demonstrate that ascorbate is the most effective aqueous-phase antioxidant in human blood plasma and suggest that in humans ascorBate is a physiological antioxidant of major importance for protection against diseases and degenerative processes caused by oxidant stress.
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Plant L‐ascorbic acid: chemistry, function, metabolism, bioavailability and effects of processing

TL;DR: The role of L-AA in metabolism and the latest studies regarding its bio- synthesis, tissue compartmentalisation, turnover and catabolism are focused on, as well as the potential to improve the L- AA content of crops.
Journal ArticleDOI

Vitamin C pharmacokinetics in healthy volunteers: evidence for a recommended dietary allowance.

TL;DR: The current RDA of 60 mg daily should be increased to 200 mg daily, which can be obtained from fruits and vegetables, and safe doses of vitamin C are less than 1000mg daily, and vitamin C daily doses above 400 mg have no evident value.
References
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Journal ArticleDOI

Supplemental ascorbate in the supportive treatment of cancer: Prolongation of survival times in terminal human cancer.

TL;DR: Analysis of the survival-time curves indicates that deaths occur for about 90% of the ascorbate-treated patients at one-third the rate for the controls and that the other 10% have a much greater survival time, averaging more than 20 times that for the Controls.
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Mechanism of C-terminal amide formation by pituitary enzymes

TL;DR: Porcine pituitary contains an enzyme with the ability to convert peptides that terminate in glycine to the corresponding des-glycine peptide amide, and its mechanism of action involves dehydrogenation and hydrolysis of the glycine-containing substrate.
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High-dose vitamin C versus placebo in the treatment of patients with advanced cancer who have had no prior chemotherapy. A randomized double-blind comparison.

TL;DR: It can be concluded that high-dose vitamin C therapy is not effective against advanced malignant disease regardless of whether the patient has had any prior chemotherapy.
Journal ArticleDOI

Distribution of ascorbic acid, metabolites and analogues in man and animals.

TL;DR: The availability of labeled AA, metabolites, and analogues has made it possible to follow up the appearance of these compounds or mctabolites thereof in various tissues of animals by means of dissecting the animals with subsequent determination of the radioactive material accumulated by the tissues or by Means of whole-body autoradiography.
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