Rumors: men can not drink soy milk, because soy milk contains estrogen, men drink will appear breast development, do not grow beard, become effeminate and other feminine characteristics; there are claims that soy milk kill sperm, men drink soy milk sperm count will be reduced. Conclusion: The isoflavones contained in soybeans are indeed phytoestrogens, but their vitality is low and cannot affect male sexual characteristics, making men feminine; there is not enough research to prove that soy milk kills sperm or affects male fertility; and epidemiological studies have found that drinking soy milk and eating soy products in moderation is good for preventing prostate cancer and many other diseases. In short, men are perfectly capable of drinking soy milk. The phytohormones in soy milk do not feminize men, as the biological activity of phytoestrogens is only one thousandth of that of drug estrogens, so as long as the intake dose is not large, it is impossible to reverse the hormonal balance and affect male sexual characteristics or the normal development of boys. The phytoestrogens in soy milk are mainly soy isoflavones, and the content is not high. In 2011, the State Key Laboratory of Food Science and Technology of Nanchang University measured 51 samples of 11 types of legumes commonly used in daily life and found that the content of soy isoflavones in soy milk was less than 100 micrograms per milliliter, and less than 100 micrograms per gram in soy milk powder, and the intake of soy isoflavones in a cup of 200 milliliters of soy milk was only 20 milligrams. The Dietary Guidelines for Chinese Residents recommends consuming 30 to 50 grams of soy foods per day, and the usual isoflavone content in soybeans is 3.5 mg/g. According to the recommended consumption, the daily intake of soy isoflavones is only 105 to 175 mg. This dose level is unlikely to cause feminizing effects in men. Soy milk kills sperm, lacking in-depth, credible research, the claim that soy milk kills sperm and affects fertility first originated from some animal experiments. Some animal experiments found that animals fed soy foods showed decreased fertility and reduced testosterone. A paper published in Human Reproduction in 2008 showed that researchers gave 15 soy products to 99 men and tracked their consumption over a three-month period and found that after eating soy products, the men’s sperm counts did There was a decrease in sperm count, up to 25%. A study published in 2009 in the journal Fertility and Sterility also contradicted the “sperm-killing” conclusion. The researchers compared the sperm count and vitality of men with different diets and found that those who ate meat and other high-fat foods for a long time had reduced sperm count and vitality, while those who ate vegetables, fruits and legumes had better sperm count and vitality. The reason for this may be that these foods usually contain more antioxidant substances. A number of studies have found that diets high in antioxidants usually mean better sperm count and vitality, and soy is rich in antioxidants, which may be the basis for its benefits to sperm. In the same year, another analysis of clinical aspects published in this journal found that even high doses of soy isoflavones (more than 150 mg of soy isoflavones per day, in some cases up to 900 mg/day) did not have an effect on sperm count or sperm quality in men. A number of studies have found that regular consumption of soy isoflavones may reduce the risk of prostate cancer, and a study published in the Journal of Nutrition in October 2007 showed that soy protein intake reduced androgen receptor expression in the male prostate, which is consistent with several epidemiological studies that found soy milk and soy products to be beneficial in preventing prostate cancer in men. The findings are consistent with several epidemiological studies on the benefits of soy milk and soy products in preventing prostate cancer in men. In addition to preventing prostate cancer, studies have found that moderate consumption of soy products can also prevent osteoporosis, cardiovascular disease, stomach cancer, and lung cancer. Overall, drinking soy milk and eating soy products in moderation has many benefits for men as well. Overall, there is not enough research to prove that soy milk kills sperm or affects male fertility. Soy milk can actually take care of men. In fact, eating the right amount of soy may be beneficial for men. A study published in the Journal of Nutrition in October 2007 showed that soy protein intake reduced androgen receptor expression in the male prostate, which is consistent with several epidemiological studies showing that soy milk and soy products are beneficial in preventing prostate cancer in men. The findings are consistent with several epidemiological studies on the benefits of soy milk and soy products in preventing prostate cancer in men. In addition to preventing prostate cancer, studies have found that moderate consumption of soy products can also prevent osteoporosis, cardiovascular disease, stomach cancer, and lung cancer. Overall, drinking soy milk and eating soy products in moderation has many benefits for men as well.