Many people have been scared off from healthful foods by the anti-soy propaganda, whitch claims that soy is almost a poison.
Soy is simply a bean.
Research has shown overwhelmingly that whole and minimally processed ( non GMO) soy foods (like tofu and tempeh,other homade variations ) provide meaningful health benefits.
They can protect against breast cancer.
There were concerns that these plant estrogens could potentially promote hormonal cancers, such as breast and prostate cancers; however, those fears were unfounded – whole and minimally processed soy foods protect against those types of cancer.
this effekt come from the isoflavones, which have a number of anti-cancer effects that are unrelated to their ability to bind the estrogen receptor.
Accordingly, soy foods are not only associated with decreased risk of hormonal cancers, but also lung, stomach, and colorectal cancers.
Summery from article by Joel Fuhrman, M.D.