11. Soy: Fewer sperm and man boobs
Too much soy could have unfortunate side effects for men. According to a study published in the Oxford Journal, men who consumed just half a serving of soy-based foods daily over the span of three months had 41 million sperm/ml less than men who didn’t consume soy foods at all (the average concentration of sperm ranges between 80 and 120 million/ml). Researchers believe isoflavones—plant compounds with estrogen-like effects—found in soybeans may be to blame. What’s more, soy beans have even been linked to the development of “man boobs”. This is a hot-button topic, so do some research or talk to your doctor if you currently have a soy-based diet, or are becoming a vegetarian.
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