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 .
Isoflavone treatment for acute menopausal symptoms
Objective : The onset of climacteric symptoms ( hot flashes and night sweats ) is the primary reason for perimenopausal women to start hormone therapy . The association of a lower incidence of postmenopausal symptoms with high intake of soybeans in Asian women suggests that phytoestrogens are an alternative to estrogen therapy . The main effective compounds in soybean are isoflavones , which have a higher binding affinity to estrogen receptor & bgr ; than to estrogen receptor & agr;. The aim of present study was to evaluate the effects of isoflavone treatment in postmenopausal women . Design : This was a double-blind prospect i ve study . Sixty healthy postmenopausal women were r and omly assigned by computer into two groups to receive 60 mg isoflavones or placebo daily for 3 months . Before and after treatment , climacteric symptoms were recorded ; serum was collected to measure the levels of lipoprotein lipids , estradiol , and follicle-stimulating hormone ; and biopsy specimens from endometrium and breast were analyzed to investigate the expression level of steroid receptors and proliferation . Endometrial thickness was measured by ultrasound . Results : Fifty-one women finished the 12-week study . In women receiving 60 mg isoflavones daily , hot flashes and night sweats were reduced by 57 % and 43 % , respectively . The treatment did not change the levels of circulating estradiol or follicle-stimulating hormone . Immunohistochemical staining of endometrial and breast biopsy specimens revealed that isoflavones did not affect expression levels of steroid receptors ; estrogen receptors & agr ; , & bgr ; , and & bgr;cx ; progesterone receptors A and B ; or the proliferation marker Ki67 . No side effects on body weight or lipoprotein lipids were observed . Conclusions : This short-term prospect i ve study implies that isoflavones could be used to relieve acute menopausal symptoms
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 .