Posted by Chantel M. Contributed by the Americal Journal of clinic nutrition
In a study of "Biological effects of a diet of soy protein rich in isoflavones on the menstrual cycle of premenopausal women" by A Cassidy, S Bingham and KD Setchell, Dunn Clinical Nutrition Centre, Cambridge, UK. Soy protein (60 g containing 45 mg isoflavones) given daily for 1 mo significantly (P < 0.01), researchers found that Plasma estradiol concentrations increased in the follicular phase and cholesterol concentrations decreased 9.6%. Similar responses occur with tamoxifen, an antiestrogen undergoing clinical trial as a prophylactic agent in women at high risk for breast cancer. These effects are presumed to be due to nonsteroidal estrogens of the isoflavone class, which behave as partial estrogen agonists/antagonists.
Now you have the evidence of soy as estrogen agonist, it should be beneficiary for women with menstrual disorder, but further studies and clinical trials should be done to confirm the result.
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