This debate about soy has been going on for so long, I'm beginning to think they don't know. I just hope they are not going by animal studies, most of the soy studies were done on rats and people don't understand when they do these studies whatever they are testing they give them 100x more of what they would eat in a lifetime. To me that is a negative result. Plus it's very common for rats esp females to get mammary tumors, I've had many many rats and I have some now with mammary tumors & they don't get much soy.