Men Taking Soy Isoflavones
Soy isoflavones possess weak estrogenic activity, approximately one hundred thousandth the potency of estradiol, and are known as phytoestrogens. Their main components include genistein (a trihydroxyisoflavone), daidzein (glycitein).
Isoflavones have similarities with estradiol, exerting mild hormonal effects by binding to estrogen receptors (ER). They also exhibit antagonistic effects against estrogen due to competition with estradiol for ER binding, thereby preventing estradiol from producing hormonal effects and providing protection against hormone-related diseases.
Middle-aged women, due to reduced secretion of hormones in their bodies, are prone to osteoporosis, which can manifest as insomnia, cardiovascular dysfunction, memory decline, dry skin lacking elasticity, breast laxity, atrophy, and early onset of menopause. Supplementing estrogen after middle age is very important.
Therefore, men generally should not take soy isoflavones, though a small amount may be consumed. However, 100 grams of soybeans contain 100 mg of isoflavones; if men were not allowed to consume isoflavones, they would need to avoid all soy products. Consuming 30-50 mg of isoflavones daily is harmless for men.
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