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Find out what vitamin D is and what it does in your body, what foods provide it, and about vitamin D supplements.

Mineral and bone disorder in chronic kidney disease occurs when damaged kidneys and abnormal hormone levels cause blood calcium and phosphorus imbalances.

Summaries of research on the safety and efficacy of several of the most commonly used ingredients in weight-loss dietary supplements.

Aprender sobre suplementos dietéticos para perder peso, lo que hacen, lo que hay dentro, cómo se los regulan, y si pueden ser perjudiciosos.

Learn about weight-loss dietary supplements, what they do, the ingredients in them, how they are regulated, and if they can be harmful.

Recommended intakes and sources of calcium, effects of deficiency and excess, groups at risk of inadequacy, and interactions with medications.

Find out what calcium is and what it does in your body, what foods provide it, and about calcium supplements.

A fact sheet that summarizes the results of studies on vitamin D and cancer prevention. It includes information about dietary recommendations for vitamin D.