Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Soy protein is primarily used to support the female reproductive system due to its content of isoflavones, which are phytoestrogens—plant-derived compounds with estrogen-like activity. Scientific studies have investigated the effects of soy isoflavones on various aspects of female reproductive health, most notably menopause symptom relief, menstrual cycle regulation, and potential effects on fertility. Clinical trials and meta-analyses have shown that soy isoflavones can modestly reduce the frequency and severity of hot flashes in peri- and postmenopausal women. The mechanism is believed to involve the weak estrogenic activity of isoflavones, which can bind to estrogen receptors and exert mild hormone-like effects, potentially helping to balance estrogen fluctuations during menopause.

However, the evidence is mixed, with some studies showing significant benefits and others finding minimal or no effect. There is less robust evidence supporting benefits for menstrual cycle regulation or fertility. Safety reviews generally indicate that typical dietary intakes of soy protein are safe for most women, though some caution is advised for individuals with hormone-sensitive conditions. Overall, the use of soy protein for supporting the female reproductive system is scientifically investigated, with moderate evidence supporting its benefit for menopause symptom relief, but less evidence for other reproductive health outcomes.

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