Women experiencing high symptomatology were randomized into either a soy or placebo bar study group. Two dietary soy bars, the daily allotment, contained 40 mg. of phytoestrogens. The women consumed the bars for a minimum of 12 weeks. Number of daily hot flashes were recorded for the entire time period and the time of each event was recorded during one week. Preliminary data indicates great within person variability in menopausal symptoms on a daily and monthly basis.
Great variability exists in the experiencing of hot flashes in menopausal women.
Soy may have a small effect on the level of reported hot flashes.