Define antioxidant with example and their classification
Answers
A substance that reduces damage due to oxygen, such as that caused by free radicals. Well-known antioxidants include enzymes and other substances, such as vitamin C, vitamin E, and beta carotene, which are capable of counteracting the damaging effects of oxidation.
Antioxidants can be classified into two major groups; that is, enzymatic and nonenzymatic antioxidants. Some of these antioxidants are endogenously produced, including enzymes, low-molecular-weight molecules, and enzyme cofactors. Many nonenzymatic antioxidants are obtained from dietary sources.
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A substance that protects cells from the damage caused by free radicals (unstable molecules made by the process of oxidation during normal metabolism). Free radicals may play a part in cancer, heart disease, stroke, and other diseases of aging.
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