30-100 ng/ml is best: You can get your vitamin d above 30 by taking 1000-2000 units per day. Higher levels are of no benefit and levels above 100 can be harmful.
Answered 2/28/2014
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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