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Vitamin D- Overview - http://www.nlm.nih.gov/medlineplus/ency/article/002405.htm
Explains functions of the vitamin with RDA intake suggestions, symptoms of deficiency, and foods high in calciferol. |
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Vitamin D, Linus Pauling Institute - http://lpi.oregonstate.edu/infocenter/vitamins/vitaminD/
Discussion of function, deficiency, disease prevention, disease treatment, food sources, supplements, research, and recommendations from the Linus Pauling Institute. |
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Vitamin D- Calciferol - http://www.anyvitamins.com/vitamin-d-info.htm
Description of the sunshine vitamin with recommended dosage, deficiency signs, and list of food sources. |
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Vitamin D- Facts and Information - http://www.go-symmetry.com/vitamin-d.htm
Facts on the vitamin such as RDA intake, functions, absorption, and deficiency signs including rickets. |