Soy Soy is also one of the foods that kill testosterone. Moderate amounts of soy usually do not cause any problem, but it has estrogenic properties that can mess with your libido, especially when consumed in large quantities.
Some research shows that regularly eating soy products like edamame, tofu, soy milk, and miso may cause a drop in testosterone levels. For example, one study in 35 men found that drinking soy protein isolate for 54 days resulted in decreased testosterone levels (3).
1 cup sweetened soy yogurt1/4 block extra-firm tofu1/2 cup shelled edamame.
Studies show that soy does not affect testosterone levels and may have potent fat-burning qualities. You see the caution on countless Internet sites related to bodybuilding: Avoid eating soy products unless you want to lower your testosterone count. At first glance the dire warnings about soy are plausible.
Is soy lowering your testosterone?
U. S.-based, unfermented, and overly processed soy will have a direct impact on your levels of testosterone and DHT, effectively lowering both. This is especially true for those guys who are looking to build muscle. Stay far away from soy-based protein.
Another question we ran across in our research was “Can soy balance my testosterone levels?”.
Soy and soy-based products Some research shows that regularly eating soy products like edamame, tofu, soy milk, and miso may cause a drop in testosterone levels. For example, one study in 35 men found that drinking soy protein isolate for 54 days resulted in decreased testosterone levels ( 3 ).
Does soy really affect hormones?
The study concluded that this food, regardless of isoflavone content, decreased testosterone and DHT with minor effects on other hormones, providing evidence for some effects of soy protein on hormones .
Also, is it true soy diet can increase estrogen levels?
Soy protein-containing foods, like tofu, textured vegetable protein and edamame, do not significantly increase estrogen levels in either men or women. Soy may have mild, beneficial anti-estrogenic or estrogenic effects, depending on your time of life.