Chief among the misconceptions about soy foods is that they promote breast cancer, because they contain a class of phytoestrogen compounds called isoflavones. Since estrogens can promote breast cancer growth, it’s natural to assume phytoestrogens might too—but it turns out to be the opposite.
https://nutritionfacts.org/video/is-soy-healthy-for-breast-cancer-survivors/
https://nutritionfacts.org/video/how-to-block-breast-cancers-estrogen-producing-enzymes/
