	Vitamin D information: vitamin d and sunlight, skin, immune system...

Daily Vitamin Requirements

How Vitamins Work

Vitamin History

Vitamin A

Vitamin B

Vitamin C

Vitamin D

Vitamin E

::	Minerals: The Trace Minerals

:: Vitamins and Minerals

Vitamin D

The RDA for this vitamin is rather low because your body is capable of making it with the help of sunlight. Vitamin D fortifies the bones and plays supporting roles in the maintenance of your brain, pancreas, skin, muscles, reproductive organs and immune system. People between ages 19 and 24 need 10 mg every day and those 25 and older need 5 mg. If you spend enough time in the sun, you may not need any supplement. But if you're stuck inside that little cubby of an office for 80 or more hours a week and rarely emerge from your batcave on the weekend, you may want to look into getting some extra vitamin D.

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