A study recently published in Human Reproduction demonstrated that intake of soy foods significantly reduces sperm counts in men. The study is especially significant because it is the largest study in humans to examine the relationship between semen quality and phytoestrogens (plant compounds that can mimic the physiological effects of the endogenous hormone, estrogen). Dr. Jorge Chavarro of the Harvard School of Public Health and his colleagues found that men who ate the most soy food had 41 ...
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