A member asked:

Although i have been taking 4000 iu/day ( up from 2000 iu), my vit d test came out 21. five months ago it was 23. any causes and recommendation plse.

A doctor has provided 1 answer
Dr. Robert Killian answered

Specializes in General Practice

Vit D Deficiency: In my patients with the same scenario it usually resolved by changing the product. Not all vitamin d is absorbed well.

Answered 10/1/2013

4.9k views

Thank

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