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Do you know of any research done on the effect of timing of vitamin D supplementation and blood draw for vitamin D level? I'm beginning to wonder if we should not take the supplement at least on the day of a blood draw and maybe for longer. Could the supplement's recent addition to the circulation give falsely higher lab results?

Asked by  Lynn on October 15, 2014

  •  Lynn on

    See title

    Answered by  Lynn on
  •  Jeff Nicklas on


    When you get a blood test for your vitamin D status, it is important to continue your supplementation intake as regularly as possible.

    That is, if you are taking daily 5,000 IU capsules you should remain taking this amount up to and through your blood test.

    If you stop taking the supplement before the test or take more right before the test, then your results might not give you an accurate understanding of your levels.

    Answered by  Jeff Nicklas on

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