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This site provides information on Carnitine, a dietary supplement, which is derived from an amino acid, found in nearly all cells of the body. Carnitine plays a critical role in energy production. ... Details >

Office of Dietary Supplements, National Institutes of Health

What foods provide iron? What affects iron absorption? Does pregnancy increase the need for iron? Read on to find the answers to these, and other, questions you have about iron. ... Details >

Office of Dietary Supplements, National Institutes of Health

The information about magnesium presented in this fact sheet is designed to help you make thoughtful decisions about eating a healthful diet and using vitamin and mineral supplements. ... Details >

Office of Dietary Supplements, National Institutes of Health

Selenium is a trace mineral that is essential to good health but required only in small amounts. Find out what foods are good sources of selenium.... Details >

Office of Dietary Supplements, National Institutes of Health

Answers basic questions about the antioxidant vitamin A, such as what it is, what foods provide it, and what intake is needed to provide the recommended dietary allowance.... Details >

Office of Dietary Supplements, National Institutes of Health

While there is a lot of evidence that dietary supplements help in preventing and treating nutrient deficiency, there is much less evidence about their usefulness in preventing or treating other diseas... Details >

National Center for Complementary and Alternative Medicine, National Institutes of Health