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Vitamin C (ascorbic acid) is a water-soluble compound that fulfills several roles in living systems. Sources include citrus fruits (such as oranges , sweet lime , etc.), green peppers , broccoli , green leafy vegetables , black currants , strawberries , blueberries , seabuckthorn , raw cabbage and tomatoes .
They have a C 6 –C 2 –C 6 structure. In biochemical terms, they belong to the family of phenylpropanoids and share most of their biosynthesis pathway with chalcones . [ 1 ] [ 2 ] Most stilbenoids are produced by plants, [ 2 ] [ 3 ] and the only known exception is the antimicrobial stilbenoid drug tapinarof which is biosynthesized by the ...
Ascorbic acid or vitamin C, an oxidation-reduction catalyst found in both animals and plants, [82] can reduce, and thereby neutralize, reactive oxygen species such as hydrogen peroxide. [ 82 ] [ 83 ] In addition to its direct antioxidant effects, ascorbic acid is also a substrate for the redox enzyme ascorbate peroxidase , a function that is ...
Vitamin C supplements among other dietary supplements at a US drug store. Vitamin C has a definitive role in treating scurvy, which is a disease caused by vitamin C deficiency. Beyond that, a role for vitamin C as prevention or treatment for various diseases is disputed, with reviews often reporting conflicting results.
Three dermatologists weigh in on the best ways to use retinol and vitamin C together in your routine to give your skin a dewy glow without causing irritation.
Resveratrol, a stilbene compound, is found in widely varying amounts among grape varieties, primarily in their skins and seeds. [41] Muscadine grapes have about one hundred times higher concentration of stilbenes than pulp. Fresh grape skin contains about 50 to 100 micrograms of resveratrol per gram. [42]
Resveratrol (3,5,4′-trihydroxy-trans-stilbene) is a stilbenoid, a type of natural phenol or polyphenol and a phytoalexin produced by several plants in response to injury or when the plant is under attack by pathogens, such as bacteria or fungi.
[2] [3] It is generally accepted that doses of any vitamin greatly in excess of nutritional requirements will result either in toxicity (vitamins A and D) or in the excess simply being metabolised; thus evidence in favour of vitamin supplementation supports only doses in the normal range.
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