"Women taking soy isoflavone tablets to alleviate hot flashes and prevent bone loss at the time of menopause might want to reconsider, " she adds.

CNN: Soy no help for bone loss, hot flashes

In the new study, published this week in the "Archives of Internal Medicine, " 248 menopausal women were randomly assigned to receive a placebo pill or 200 milligrams of soy isoflavone supplements per day -- a dose "equivalent to approximately twice the highest intake through food sources in typical Asian diets, " Levis says.

CNN: Soy no help for bone loss, hot flashes