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Soy-based foods may lower sperm count (more in fat men)
Continue to the storyhe researchers found the association between soy foods and lower sperm count was stronger in overweight men, which might suggest hormones are playing a role. "Men who are overweight or obese tend to have higher levels of androgen-produced estrogen. They are converting a male hormone into a female hormone in their fat. The more body fat you have, the more estrogen you produce in your fat," Chavarro said.