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 .
Efficacy and safety of a soy isoflavone extract in postmenopausal women: a randomized, double-blind, and placebo-controlled study.
OBJECTIVE To investigate the efficacy of soy isoflavone on climacteric symptoms in postmenopausal women . DESIGN In this double-blind , r and omized , placebo-controlled study , a total of 80 women ( mean age = 55.1 years ) , who reported 5 or more hot flush episodes per day , were r and omized to receive either 250 mg of st and ardized soy extract ( Glycine max AT ) a total of 100mg/day of isoflavone ( n = 40 ) or placebo ( n = 40 ) . Exclusion criteria included : contra-indication for hormone therapy ( HT ) , chronic gastrointestinal diseases , and users of HT within the preceding 6-months . For 10-months , climacteric symptoms were evaluated using a score card and the menopausal Kupperman index . Compliance and safety were also assessed . At baseline and the end of the study , lipid and hormonal profiles , as well as vaginal , mammographic and ultrasonographic parameters were measured . The t-test , Wilcoxon test and ANOVA were used in the statistical analysis . RESULTS At baseline , the mean number of hot flushes was 9.6 + /- 3.9 per day in the isoflavone group and 10.1+/-4.9 in the placebo group ( p>0.05 ) . After 10 months , there was a significant reduction in frequency of hot flushes among isoflavone users when compared to those on placebo ( 3.1 + /- 2.3 and 5.9 + /- 4.3 , respectively ) ( p<0.001 ) . Kupperman index mean values showed a significant reduction in both groups . However , soy isoflavone was significantly superior to placebo , in reducing hot flush severity ( 69.9 % and 33.7 % , respectively ) ( p<0.001 ) . Endometrial thickness , mammography , vaginal cytology , lipids and hormonal profile did not change in both groups . No serious adverse event related to isoflavone treatment was reported . CONCLUSIONS The soy isoflavone extract exerted favorable effects on vasomotor symptoms and good compliance , providing a safe and effective alternative therapeutic for postmenopausal women
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 .