Vitamin E is a supplement used to prevent or treat a lack of vitamin E in the body. A low body level of vitamin E is rare. Most people who eat a normal diet do not need extra vitamin E. However, vitamin E supplements are used in premature newborns and in people who have problems absorbing enough vitamin E from their diets. Vitamin E is important in protecting your body's cells from damage. It is known as an antioxidant.
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