As an update to the ongoing soy debate, it seems that soy supplements as used in a recent study are not helpful for menopausal symptoms and bone density, but the effects of fermented soy may be very different.
A recent double-blind study of 102 US women showed that eight weeks of daily consumption of a fermented soy product containing natural equol (made by the fermentation of whole soy germ) reduced the frequency of moderate to severe hot flushes, and muscle discomfort. It was also shown to be superior in its effects to the consumption of a soya isoflavone supplement.
In addition, it was found, via a double-blind, placebo-controlled study, to inhibit bone breakdown and prevent bone mineral density loss in Japanese women. No serious adverse events were reported in any of the studies. The results of these studies were presented at the North American Menopause Society Annual meeting.