I get this question almost daily from my breast cancer patients. People are understandably confused. As is the case with other foods, as research evolves, there are changing messages disseminated about their impact on health matters.
So, what information compels you to make decisions in life? The story about soy is the story about the evolution of knowledge about diet and cancer in general, as they say, and here is the rest of the story.
The earliest studies in the 70’s and 80’s indicated that Asian women had lower breast cancer risk than European and American women. It turns out that many things about the life and culture of Asian women are different beyond their diets. The early thinking about possible connections to lower cancer risk focused on low fat intake and soy. Many in the research community advocated lowering dietary fat and increasing soy intake to reduce breast cancer risk and improve survival. Thus was born a wave of enthusiasm for all things soy.