Vitamin D blood tests

Posted on September 26, 2011 by John Cannell, MD

Many people obtain vitamin D blood tests without knowing the differences and limitations of current testing technology. I feel testing is important, not so much to see if a person is deficient, but to convince both the patients and the doctor that the deficiency is present. Except during the summer, most vitamin D levels obtained will show deficiency.

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About John Cannell, MD

Dr. John Cannell is founder of the Vitamin D Council. He has written many peer-reviewed papers on vitamin D and speaks frequently across the United States on the subject. Dr. Cannell holds an M.D. and has served the medical field as a general practitioner, itinerant emergency physician, and psychiatrist.
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One Response to Vitamin D blood tests

  1. drbrewer@mwt.net said on October 4, 2011 at 3:25 pm

    I was told that Medicare will only pay for one 25(OH)D test per year.
    I believe this is a recent change. If so, it is not helpful when you are trying to raise your Vitamin D levels with supplementation and want to check your levels at least twice a year.

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