The C.A.M. Report
Complementary and Alternative Medicine: Fair, Balanced, and to the Point
  • About this web log

    This blog is intended as an objective and dispassionate source of information on the latest CAM research. Since my background is in pharmacy and allopathic medicine, I view all CAM as advancing through the development pipeline to eventually become integrated into mainstream medical practice. Some will succeed while others fail. But all are treated fairly here.

  • About the author

    John Russo, Jr., PharmD, is president of The MedCom Resource, Inc. Previously, he was senior vice president of medical communications at www.Vicus.com, a complementary and alternative medicine website.

  • Common sense considerations

    The material on this weblog is for informational purposes. It is not medical advice or counsel. Be smart, consult your health professional before using CAM.

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    Orange juice as a source of vitamin D

    There’s a short list of food sources of vitamin D.

    Researchers from Boston compared the bioavailability of vitamins D2 and D3 from orange juice vs capsules.

    First, the details.

    • A group of healthy adults received 1000 IU vitamin D3, 1000 IU vitamin D2, or placebo in orange juice or a capsule for 11 weeks at the end of winter.
    • Neither the patients nor researchers knew the treatment given — double blind.

    And, the results.

    • 64% of participants began the study deficient in vitamin D (less than 20 ng/mL).
    • Vitamin D from orange juice and capsules were both bioavailable to the body.
    • There was no difference in blood levels of vitamin D3 obtained from juice or capsules.
    • There was no difference in blood levels between vitamin D2 from juice or capsules.
    • There was no significant difference in parathyroid hormone concentrations between the groups.
      • Parathyroid hormone stimulates production of active vitamin D in the kidney, which facilitates calcium absorption from the intestines.

    The bottom line?

    So, fortified orange juice is as good a source of vitamin D as a capsule.

    The NIH has published a dietary supplement fact sheet on vitamin D, which includes background and other food sources of the vitamin.

    More on the science of vitamin D is here. And a new Medscape review is here.

    5/10/10 14:03 JR

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