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Antioxidants that are reducing agents can also act as pro-oxidants. For example, vitamin C has antioxidant activity when it reduces oxidizing substances such as hydrogen peroxide; [103] however, it will also reduce metal ions such as iron and copper [104] that generate free radicals through the Fenton reaction.
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.
Deficiency of vitamin C causes scurvy, formerly a major disease of sailors in long sea voyages. It is used as a food additive and a dietary supplement for its antioxidant properties. The " d " form ( erythorbic acid ) can be made by chemical synthesis, but has no significant biological role.
“Vitamin C is best known for its immune-boosting abilities, but it also supports wound healing, enhances iron absorption, and acts as a powerful antioxidant to protect cells from damage,” says ...
Vitamin C. Vitamin C is an antioxidant that “has been shown to have a positive impact on immune support,” says Michael Del Junco, a family medicine physician with Providence St. Joseph ...
This is a list of antioxidants naturally occurring in food. Vitamin C and vitamin E – which are ubiquitous among raw plant foods – are confirmed as dietary antioxidants, whereas vitamin A becomes an antioxidant following metabolism of provitamin A beta-carotene and cryptoxanthin.
The relative importance of the antioxidant and pro-oxidant activities of antioxidant vitamins is an area of current research, but vitamin C, for example, appears to have a mostly antioxidant action in the body. [7] [9] However, less data is available for other dietary antioxidants, such as polyphenol antioxidants, [10] zinc, [11] and vitamin E ...
Antioxidants play a crucial role in mitigating lipid peroxidation by neutralizing free radicals, thereby halting radical chain reactions. Key antioxidants include vitamin C and vitamin E . [ 8 ] Additionally, enzymes including superoxide dismutase , catalase , and peroxidase contribute to the oxidation response by reducing the presence of ...
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