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What are the causes of vitamin d deficiency in men?

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The cause...: ...Of vitamin d deficiency is either lack of manufacture of vitamin d within the body, usually due to lack of sun exposure, or lack of sufficient intake of dietary vitamin d, or a combination of the two. This is the same in men and women.

Answered 3/21/2018

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A member asked:

What could be reason for a vitamin d deficiency?

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