A 63-year-old female asked:
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vitamin d 20 ng/ml & nash. vit a, e, k normal. taking d3 for 2 months - no change. can this be an absorption issue even tho other fat sol vits normal?

2 doctor answers
Dr. John Chiu
Dr. John Chiu answered
56 years experience Allergy and Immunology
Possible but: It depends on what dose you have been taking. I usually advise my patient to take 5000 u daily for 2 months then repeat the level to adjust the dose required since everyone's production and breakdown of vitamin d3 varies.
Answered on Mar 6, 2014
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Dr. Pamela Pappas
41 years experience Psychiatry
May need magnesium: Magnesium (mg) is a necessary co-factor for converting vitamin d into its active form. You may well be deficient in mg, and this can be tested via rbc magnesium. (serum mg is not so useful, since the body keeps this very stable, but your total body stores may still be deficient). http://tinyurl.com/msoth5j talk with your doctor about using magnesium glycinate to replenish this. It may help!
Answered on Sep 29, 2016
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