Click here to ready a case study of gynecomastia in a male caused by soy milk. Turns out, moderation is key … Side effects may include allergic reaction, impaired fertility or difficulty maintaining a healthy weight. While both soy and rice milk are good choices if you're trying to limit your intake of animal products or have an allergy or intolerance to cow's milk, they're not necessarily healthy for everyone. Another 2004 study, comparing babies who were fed soy milk with a control group, found no "estrogen-like" hormonal effects in the soy drinkers. soy milk side effects in men. Now, these studies are not exhaustive. Turns out, moderation is key and is not likely to disrupt hormone levels. any risks or side effects since it has plant estrogen in it? Some health-conscious people drink it because they think it is the 'heart-healthy low fat option.' 27 years experience Obstetrics and Gynecology. There's never an excuse soy milk Some lactose-intolerant folks drink it because they want a milk substitute. Milk made from ingredients other than cow’s milk include goat, rice, almond and soy. Is soya milk for boys a good idea if the isoflavones behave as estrogen in the body? Soy-based products like tofu, miso, tempeh, and soy milk are go-to items of choice for vegans and vegetarians as a means of getting their protein. Lactose, a sugar found in cow’s milk, causes side effects in your digestive system, the National Institute of Diabetes and Digestive and Kidney Diseases relates. Dr. Douglas Lawson answered. Soy milk side effects include low sperm counts and decreased fertility in males. Soy Milk Formula for Infants. Soy Milk: the more you know: I did a little research and this is what I found, hope it helps, Soy milk is produced from the soybean plant. And some vegans drink it because they don't want to drink cow milk. While soy milk formula is safe for babies, it may not be beneficial for infants with colic problems.Moreover, soy milk formula is also not recommended for infants below the age of two years because it contains very less fat as compared to cow’s milk. Is soya milk for boys a good idea if the isoflavones behave as estrogen in the body? But no matter what reason you have for drinking soy milk, it is not a valid excuse. In the United States, about 750,000 infants are given soy formulas every year. weight gain? Soy Milk Side Effects in Males: The same soy isoflavones that cause estrogen dominance in women may cause breast enlargement (gynecomastia) in males. A 48-year-old female asked: does soy milk help in alleviating hot flashes of premenopause?