An U.S. study warns that eating and drinking many foods made from soybeans, which contain isoflavones, weaken the quality of male sperm. Apparently, not only soybeans could cause damage to soil, but its consumption also affect sexuality of men.

Many studies in animals showed the relationship between consumption of soybeans and fewer sperm, especially in mice.

Soy contains isoflavones, an organic compound that serves as female hormones. The isoflavones are structurally similar to estrogen and could imitate his actions in the body.

So soybeans may have a behavior similar to estrogen in many organs and tissues, which may be beneficial in some cases but certainly not for the production of sperm. At least that was demonstrated with animal studies.

The survey was done for three months with products based on soy in 99 men. It revealed that those who had been fed with soy had 41 million sperm per millilitre less than those they had not eaten.

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