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A member asked:
How long does it take to raise vitamin d levels once supplementation begins (4, 000 iu/day). current level is 17. thanks.
A doctor has provided 1 answer
Up to 3 mos: Vitamin d is fat soluble and can take up to three months to reach a new equilibrium, although the level may start to increase after a much shorter time.
Answered 4/13/2018
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