I remember reading, I think in illustrated science;
Processed soy contains estrogen like chemicals that act like estrogen in the human body. The more processed the soy is, the more estrogen-like chems there appear to be.
This apparently makes the processed soy also increase chances of certain types of cancer, especially in women.
Children who are exposed to soy from conception are less likely to be affected by it.
_
That being said.. maybe it explains why Asian men aren't all that well hung?