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Vitamin D
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Vitamin D is a vitamin (a substance the body requires in small doses for proper nutrition and function) that is fat-soluble, meaning that it is dissolved and stored in the fat of your body. Vitamin D maintains proper levels of calcium and phosphorus in the blood and together with calcium builds strong bones. The November 9, 2005, issue of JAMA contains an article about sufficient levels of vitamin D for healthy bones.
SUNLIGHT EXPOSURE
Sun exposure for 10 to 15 minutes at least twice a week usually provides adequate amounts of vitamin D. Certain conditions such as cloud cover, northern climates, pollution, and the winter months may not provide adequate sunlight exposure. Excess sun exposure causes skin cancer, so you should limit exposure to sunlight, not use tanning beds, and wear protective clothing and a sunscreen with a sun protection factor (SPF) of at least 15 when outdoors for longer than . . . [Full Text of this Article]
Erin Brender, MD, Writer;
Alison Burke, MA, Illustrator;
Richard M. Glass, MD, Editor
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