More Vitamin D information

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Vitamin Din a New Light by Donald W. Miller, Jr., MD

 

There are thirteen vitamins humans need for growth and development and to maintain good health. The human body cannot make these essential bio-molecules. They must be supplied in the diet or by bacteria in the intestine, except for vitamin D. Skin makes vitamin D when exposed to ultraviolet B (UVB) radiation from the sun. A light-skinned person will synthesize 20,000 IU(international units) of vitamin D in 20 minutes sunbathing on a Caribbean beach.

 

http://doctorsaredangerous.com/articles/vitamind.htm