Four trials that were not combined in meta-analyses suggested that extracts with high ( > 30 mg/d ) levels of genistein consistently reduced the frequency of hot flushes .
BACKGROUND Vasomotor symptoms , such as hot flushes and night sweats , are very common during the menopausal transition .
Hormone therapy has traditionally been used as a highly effective treatment , but concerns about increased risk of some chronic diseases have markedly increased the interest of women in alternative treatments .
Some of the most popular of these treatments are foods or supplements enriched with phytoestrogens-plant-derived chemicals that have estrogenic action .
OBJECTIVES To assess the efficacy , safety and acceptability of food products , extracts and dietary supplements containing high levels of phytoestrogens when compared with no treatment , placebo or hormone therapy for the amelioration of vasomotor menopausal symptoms ( such as hot flushes and night sweats ) in perimenopausal and postmenopausal women .
A Pilot Study of the Effects of Phytoestrogen Supplementation on Postmenopausal Endometrium
Objective : This study was design ed to assess endometrial histology in postmenopausal women not taking hormone replacement therapy , to evaluate side effects and efficacy of phytoestrogens in treating menopause-associated symptoms , and to determine whether 6 months of phytoestrogen supplementation altered endometrial histology . Methods : We performed a prospect i ve , double-blinded , r and omized , placebo-controlled trial comparing the effects of 6 months of dietary phytoestrogen supplemtation versus placebo in postmenopausal women . Baseline endometrial biopsies were performed and , if adequate , nonhyperplastic , noncancerous , and non-ovulatory , subjects were r and omly assigned to receive daily placebo or soy cereal supplementation for 6 months . Study subjects completed baseline and weekly dietary , symptom , and side effect logs . Repeat endometrial biopsies were obtained at 6 months . Results : Subjects were recruited from January 1998 through June 2000 . Twenty-seven subjects were r and omized , and 19 completed the study . One ( 3.7 % ) baseline endometrial sample was weakly proliferative . All other baseline and final biopsies were consistent with atrophic , inactive endometrium . The maximum risk of endometrial stimulation with phytoestrogens is 35 % . Hot flushes , night sweats , and vaginal dryness were significantly less severe at the final week of the study compared with baseline in the placebo group . Insomnia was more common in the treated group . There were no other statistically significant differences in symptoms or side effects . Conclusion : Phytoestrogens did not cause stimulation of the endometrium . Insomnia was more frequent over the 6-month study in the soy group , whereas hot flushes , night sweats , and vaginal dryness improved from baseline in the placebo group but not in the soy group
Four trials that were not combined in meta-analyses suggested that extracts with high ( > 30 mg/d ) levels of genistein consistently reduced the frequency of hot flushes .
BACKGROUND Vasomotor symptoms , such as hot flushes and night sweats , are very common during the menopausal transition .
Hormone therapy has traditionally been used as a highly effective treatment , but concerns about increased risk of some chronic diseases have markedly increased the interest of women in alternative treatments .
Some of the most popular of these treatments are foods or supplements enriched with phytoestrogens-plant-derived chemicals that have estrogenic action .
OBJECTIVES To assess the efficacy , safety and acceptability of food products , extracts and dietary supplements containing high levels of phytoestrogens when compared with no treatment , placebo or hormone therapy for the amelioration of vasomotor menopausal symptoms ( such as hot flushes and night sweats ) in perimenopausal and postmenopausal women .