A member asked:

What is the mechanism by which our bodies make vitamin d?

A doctor has provided 1 answer
Dr. Martin Fried answered

Specializes in Nutrition

Sunlight: Sunlight on the skin helps convert cholecalciferol to 25 hydroxycholecalciferol. Then the kidney adds another hydroxy to make 1, 25 dihydroxycholecalciferol which is active vitamin d.

Answered 5/2/2013

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