Dietary Reference Intakes Proposed Definition and Plan for Review of Dietary Antioxidants and Related Compounds (1998) / Chapter Skim
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Toward a Definition of Dietary Antioxidant
Toward a Definition of Dietary Antioxidant
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In contrast to these fat-soluble antioxidants that function in cell membranes, lipoproteins, and lipid droplets, water-soluble vitamin C directly quenches a variety of reactive oxygen and nitrogen species in the aqueous portion of cells and extracellular fluids. Selenium, not present in high enough quantities to be a direct antioxidant, participates as an essential constituent of glutathione peroxidases and thioredoxin reductase in the breakdown of peroxides, thus preventing the potentially damaging generation of reactive oxygen species.
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