Soy Does Not Raise Estrogen or Lower Testosterone Levels in Men. Misconceptions concerning soyfoods stem from the fact that soy is a uniquely rich source of isoflavones, which are naturally occurring plant chemicals classified as phytoestrogens.

Why soy is bad for males?

Male hormones

Low libido and muscle mass, mood changes, reduced energy levels, and poor bone health are all associated with low testosterone levels. The notion that the phytoestrogens in soy disrupt testosterone production and reduce its efficacy in the body might seem plausible on the surface.

How much soy do you need to increase estrogen?

Drinking just two cups of soymilk or eating one cup of tofu produces blood levels of isoflavones that can be 500 to 1,000 times higher than typical estrogen levels in women.