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Antioxidants: Redefining Their Roles

SLIDESHOW: Redefining AntioxidantsAt physiological levels, free radicals play important positive roles in cellular physiology, including cell signaling and proper immune function. However, free radicals can also damage all classes of macromolecules (eg, lipids, proteins, nucleic acids), and excess free radicals have been implicated in the pathogenesis of more than 100

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