An overabundance of phytoestrogens may lead to a condition in women called Polycystic Ovarian Syndrome, characterized by cysts on the ovaries and a hormone imbalance. Women who have PCOS may notice a decrease in fertility, as well as expression of more masculine secondary sex traits such as the excessive growth of facial and body hair. Phytoestrogens are endocrine disruptors, so if you have certain conditions or are predisposed to PCOS, you may wish to consult with your physician before increasing estrogen. Men who have a high phytoestrogen intake may experience gynecomastia or secondary female sex characteristics.

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