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A member asked:
What if i stand up too fast, i get a black out. why?
A doctor has provided 1 answer
No: If you have a deficiency, you generally need 2000 units of vitamin d3/day or more to bring the level up over several months. A multivitamin commonly has 400 units or less, which is nowhere near enough. Relax, generic d3 is dirt cheap.
Answered 8/1/2013
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