I was curious and looked it up. Nearly all studies say it actually helps prevent prostate cancer. The anti soy stuff is mostly BS. The jury is still out on some things though, especially GMO soy. But normal soy has a lot of health benifits when consumed in reasonable amounts. You probably shouldn't consume it in extreme amounts, but that's true for almost anything.
I think you're looking at research on initial causation, which is probably more based on genetics than anything else. There is compelling evidence that soy can accelerate advanced stages. If you're high risk or have been diagnosed, it's probably better to avoid intentional soy consumption. Most of us probably eat a lot of soy without even realizing it because of its varied uses.
What I found was indeed talking about initial causation and not late stage cancer. After looking into more, there is some correlation with specific types of already aggressive prostate cancers. But populations that eat considerably more soy also have much lower prostate cancer rates in general. In not a physician by any means. But I bet there is some other variable at work. It's also unclear how diffrent types of soy scew the results. GMO soy seems to retain pesticide residue more readily, for instance. The issue has also become politicized and there is nonsense coming from both sides. Hopefully someone reputable will study it more.
Maybe, but the story is real.
