An antioxidant is a classification of organic substances, which includes vitamins A, C and E, selenium, and carotenoids. Carotenoids give many fruits and vegetables their color. Beta-carotene is one example of a carotenoid. Antioxidants are also known to be effective in helping to prevent heart disease, stroke and even cancer.Antioxidants work to deactivate free radicals, which roam the human body in the form of un-oxidized oxygen molecules or O2. Free radicals are the natural by-product of the processes happening within and among the various cells in the body. Environmental factors such as, tobacco smoke and radiation, also create free radicals.If free radicals are left to oxidize on their own, they can create carcinogens. The process can damage cell walls, cell structures and genetic material within the cells themselves. Damage to cells causes scar tissue and then the scar tissue either becomes benign or malignant (cancerous).Antioxidants deactivate free radicals before they get a chance to oxidize and do harm to the body. Despite numerous studies, it is still unknown as to which groups of people, if any, benefit from taking antioxidant supplements. However, it is becoming widely known that antioxidants are crucial in cancer and heart disease prevention.
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