what are free radicals? how are they found
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Free radicals are highly reactive and unstable molecules that are produced in the body naturally as a byproduct of metabolism (oxidation), or by exposure to toxins in the environment such as tobacco smoke and ultraviolet light.
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Free Radicals, Antioxidants in Disease and Health
Lien Ai Pham-Huy, Hua He, and Chuong Pham-Huy
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Abstract
Free radicals and oxidants play a dual role as both toxic and beneficial compounds, since they can be either harmful or helpful to the body. They are produced either from normal cell metabolisms in situ or from external sources (pollution, cigarette smoke, radiation, medication).
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