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Red Clover No Relief for Hot Flashes
Excerpt
By Andrew Stern, Reuters Health
Red clover extract, advertised as a
substitute for hormone therapy, offered menopausal women no more
relief from hot flashes than a placebo, according to a study published
on Tuesday.
Many women who suffer menopausal
symptoms are seeking an alternative to hormone replacement therapy
after a recent study showed long-term use of the most popular
estrogen-progestin combination increased the risks of heart disease,
breast cancer and dementia.
The new study said interest in
red clover extract stemmed in part from reports that Asian women
suffer fewer hot flashes and other menopausal symptoms because
their diets are rich in isoflavones, natural compounds found in
soy products and legumes such as chickpeas.
"Hot flashes are the primary reason
that women seek medical attention for menopausal symptoms," Jeffrey
Tice of the University of California, San Francisco, wrote in
the latest study.
The results of the 12-week study
appeared in the Journal of the American Medical Association, which
has previously published reports rebuking the efficacy of other
herbal remedies.
In this trial, 250 menopausal women
experiencing at least five hot flashes a day were given one of
two isoflavone products made from red clover extract -- Promensil
or Rimostil -- or a placebo.
All of the women experienced a
comparable decline in hot flashes of between 34 percent and 41
percent, though Promensil, reduced them more quickly.
"Although the study provides some
evidence for a biological effect of Promensil, neither supplement
had a clinically significant effect on hot flashes or other menopausal
symptoms when compared with placebo," the report said.
Novogen Ltd, the Australia-based
maker of Promensil and Rimostil that funded the study, said the
findings overstated the "placebo effect." In a statement, the
company said previous studies showed women taking a placebo had
symptoms decline by no more than 20 percent.
But a Duke University reproductive
endocrinologist, Dr. Claude Hughes, said in a telephone interview
that the placebo effect can vary widely in such studies of menopausal
symptoms.
Hughes said he often starts his
menopausal patients with diets rich in soy foods, such as tofu,
then tries isoflavone extracts, then moves on to hormone replacement
therapy.
"It's a matter of finding what
works," Hughes said.
Reference
Source 89
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