Vitamin D source

Unlike with most vitamins, it is difficult for most people to get the recommended amount of vitamin D from foods. While the body makes vitamin D when exposed to sunshine, the ultraviolet energy in sunlight can cause skin cancer and premature wrinkles.

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Review Date: 2/19/2008
Reviewed By: Harvey Simon, MD, Editor-in-Chief, Associate Professor of Medicine, Harvard Medical School; Physician, Massachusetts General Hospital.

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