- The interest in soy came about because of the striking difference in breast cancer rates between Asian countries and the West. Of course there are other lifestyle differences between these cultures as well.

- The fact that Asian migrants assume the higher rates of breast cancer of their host country after a couple of generations argues for an environmental cause that has to do with acculturation

- Asian countries have high soy intake, Western countries minimal

- Vegetarians, who until recently were the one Western population with any soy intake have lower cancer rates