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Soy foods do little to ease menopause, experts say
Source: Agencies |
November 29, 2012, Thursday
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WOMEN who eat a lot of soy-based foods or fiber don't seem to have fewer menopause symptoms, according to a US study - the latest research to find no benefits from eating extra amounts of soy, a food abundant in dietary estrogen.
Hormone replacement therapy, based on estrogen and other hormones, is effective in reducing hot flashes and other menopause symptoms, but carries some risks of heart disease and cancer. Researchers have been testing whether plant estrogens can offer benefits, perhaps without the risks.
"Many women can't or don't want to take hormones," making dietary estrogen an appealing alternative, said Ellen Gold, the lead author of the study and a professor at the University of California Davis School of Medicine.
But studies on plant estrogens have been mixed. A review of 17 studies on soy supplements has found the pills can reduce the frequency and severity of hot flashes, but some individual trials on soy protein pills have found no benefits.
"It might be a dead end," said William Wong, a professor at Baylor College of Medicine who has studied the effects of soy protein on menopause symptoms but was not part of the study.
To see if women who choose to eat more phytoestrogens have an easier time through menopause, Gold and her colleagues tracked 1,651 women for 10 years. At the beginning of the study, none had gone through menopause.
By the end, Gold's team could find no consistent pattern between the amount of phytoestrogens eaten and how often or how severely women experienced hot flashes and night sweats. The same was true for how much fiber they ate.
Hormone replacement therapy, based on estrogen and other hormones, is effective in reducing hot flashes and other menopause symptoms, but carries some risks of heart disease and cancer. Researchers have been testing whether plant estrogens can offer benefits, perhaps without the risks.
"Many women can't or don't want to take hormones," making dietary estrogen an appealing alternative, said Ellen Gold, the lead author of the study and a professor at the University of California Davis School of Medicine.
But studies on plant estrogens have been mixed. A review of 17 studies on soy supplements has found the pills can reduce the frequency and severity of hot flashes, but some individual trials on soy protein pills have found no benefits.
"It might be a dead end," said William Wong, a professor at Baylor College of Medicine who has studied the effects of soy protein on menopause symptoms but was not part of the study.
To see if women who choose to eat more phytoestrogens have an easier time through menopause, Gold and her colleagues tracked 1,651 women for 10 years. At the beginning of the study, none had gone through menopause.
By the end, Gold's team could find no consistent pattern between the amount of phytoestrogens eaten and how often or how severely women experienced hot flashes and night sweats. The same was true for how much fiber they ate.
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