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Vitamin C megadosage is a term describing the consumption or injection of vitamin C (ascorbic acid) in doses well beyond the current United States Recommended Dietary Allowance of 90 milligrams per day, and often well beyond the tolerable upper intake level of 2,000 milligrams per day. [1]
Ascorbic acid efflux by embryos of dicot plants is a well-established mechanism of iron reduction and a step obligatory for iron uptake. [a] All plants synthesize ascorbic acid. Ascorbic acid functions as a cofactor for enzymes involved in photosynthesis, synthesis of plant hormones, as an antioxidant and regenerator of other antioxidants. [95]
[35] [36] These findings demonstrated ascorbic acid's pro-oxidant capabilities to produce hydrogen peroxide and thus, proposed a possible pharmacological mechanism of action against cancer cells. Nonetheless, ascorbic acid's potential as an anti-tumour therapy is still dubious, as other pro-oxidant substances (such as menadione [37] [38]) have ...
Ascorbyl glucoside exhibits superior stability and penetration ability compared to ascorbyl phosphate salts, but the rate of its in vivo conversion to ascorbic acid is not known. [1] Ascorbyl glucosides such as AA-2G, like many other derivatives of the ascorbic acid, show antiscorbutic effects. [2] It is also sometimes used in skin whitening ...
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 .
[35] [94] While ascorbic acid is effective antioxidant, it can also oxidatively change the flavor and color of food. With the presence of transition metals, there are low concentrations of ascorbic acid that can act as a radical scavenger in the Fenton reaction. [93] 2 Fe 3+ + Ascorbate → 2 Fe 2+ + Dehydroascorbate 2 Fe 2+ + 2 H 2 O 2 → 2 ...
Some research has found a link between tattoos and an increased risk of cancer, and recent evidence appears to suggest that tattoos could heighten the risk of blood cancer, in particular.
Ascorbic acid is easily oxidized and so is used as a reductant in photographic developer solutions (among others) and as a preservative. [citation needed] In fluorescence microscopy and related fluorescence-based techniques, ascorbic acid can be used as an antioxidant to increase fluorescent signal and chemically retard dye photobleaching. [14]