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A member asked:
What is the vitamin d reference range in the blood?
A doctor has provided 1 answer
32-130 ng/ml: The normal range is 32-130 ng/ml for vitamin d-25-oh, the standard test for vitamin d levels. I believe tha levels of 40 are optimal for Insulin resistance, but levels of 60 or above provide additional cancer protective effects!
Answered 4/17/2016
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