Antioxidants are man-made or natural substances that may protect your cells against free radicals, which may play a role in heart disease, cancer, and other diseases. Free radicals are molecules produced when your body breaks down food or when you’re exposed to tobacco smoke or radiation.
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There are hundreds, probably thousands, of different substances that can act as antioxidants. The most familiar ones are vitamin C, vitamin E, beta-carotene, and other related carotenoids, along with the minerals selenium and manganese.
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Antioxidants are found in many foods, and fruits and veggies are particularly rich sources.
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