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How many different D vitamins are there and what do they all do?

asked Jun 22 '11 at 16:30

hnonnac's gravatar image

hnonnac
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The major forms of D vitamins are D1 (compound of ergocalciferol with lumisterol), D2 (ergocalciferol), D3 (cholecalciferol), D4 (dihydroergocalciferol), and D5(sitocalciferol). D2 and D3 are the two main forms that humans ingest.

D vitamins are essential for preventing rickets, maintaining healthy hair follicle growth, and maintaining bone mineral density. There is some evidence emerging that Vitamin D deficiencies play a part in cadiovascular disease and cancer, but these are anecdotal.

Best sources of Vitamin D are fish, fortified milk, eggs, and cod liver oil.

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answered Jul 09 '11 at 07:52

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Hobbithead
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Asked: Jun 22 '11 at 16:30

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Last updated: Jul 09 '11 at 07:52


 
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