By Mitzi Perdue
Monday, March 26, 2012
The National Center for Complementary and Alternative Medicine has authoritative research on which non-mainstream therapies work and which don't. From Evening Primrose for PMS to hypnosis for anxiety, here's a quick run down.
(WOMENSENEWS)--Does Evening Primrose relieve menopausal symptoms or premenstrual stress? Does Ginkgo biloba extract help prevent cognitive decline?
Forty percent of Americans--a majority of them women--spend 10 percent of their out-of-pocket health care dollars on complementary and alternative therapies.
Given the money and hopes pinned on these therapies, their proven benefits were discussed earlier this month as one of the topics at the Women's Health 2012 conference in Washington, D.C. The three-day meeting drew a thousand health professionals from around the country and around the world.
Dr. Josephine P. Briggs, director of the National Center for Complementary and Alternative Medicine, based in Gaithersburg, Md., reported on findings from the agency's large-scale double-blind trials for alternative therapies. The center is the federal government's lead agency for scientific research on complementary and alternative medicine.
Evening Primrose oil, it turns out, has not been any better than a placebo in these trials at relieving menopausal symptoms or PMS. On the benefits of gingko biloba, an extract from the leaves of the ginkgo tree, Briggs was likewise discouraging.
A six-year study of more than 3,000 individuals, found that compared with a placebo, Ginkgo biloba didn't prevent or even reduce cognitive decline. In fact there were slightly (but statistically insignificant) more cases of dementia among participants who were taking the supplement than among those taking a placebo.
A similar study for the dietary supplements glucosamine and chondroitin, shows that these don't appear to work any better than a placebo in slowing down the loss of knee cartilage for osteoarthritis patients.
Researchers at the National Center for Complementary and Alternative Medicine also found that few of the widely advertised dietary supplements live up to their promise.