MD - best to do some more research on soy. The Japanese eat fermented soys like tofu. They eat soy very differently to the way westerners do and due to the way it is added to so many of our processed foods we actually eat greater quantities of soy than they do. So it really is a quality, not quantity issue there. Also I think there is a lot more to lower cancer rates than just eating soy. It is good that you already like to eat tofu, but I doubt there is a real need to switch to soy unless there are other factors there.