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

    This blog ran from 2006 to 2016 and was 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, 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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    Vitamin E and the risk of stroke

    Researchers at Harvard Medical School, in Boston, reviewed the evidence.

    A stroke is the sudden death of brain cells due to inadequate blood flow. Ischemic stroke is the most common kind of stroke and is caused by an interruption in the flow of blood to the brain (as from a clot blocking a blood vessel). Hemorrhagic stroke is caused by a ruptured blood vessel in the brain.

    First, the details.

    • 9 studies investigating the effect of vitamin E on stroke were included, totaling 118,765 participants (including vitamin E and placebo).
      • 7 reported data for total stroke.
      • 5 studies each reported on hemorrhagic and ischemic stroke.
    • Studies had to have at least 1 year of follow-up.

    And, the results.

    • Vitamin E had no effect on the risk for total stroke.
    • The risk for hemorrhagic stroke was increased 22% — a significant difference.
    • The risk of ischemic stroke was reduced 10% — a significant difference.
    • In terms of absolute risk, this translates into 1 additional hemorrhagic stroke for every 1250 individuals taking vitamin E.
    • In contrast 1 ischemic stroke was prevented for every 476 individuals taking vitamin E.

    The bottom line?

    The authors concluded, “Given the relatively small risk reduction of ischemic stroke and the generally more severe outcome of hemorrhagic stroke, indiscriminate widespread use of vitamin E should be cautioned against.”

    11/30/10 21:07 JR

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