Soya
Soya acts pretty much like oestrogen, so my wife has to avoid it as a way to prevent her from having breast cancer, again. Go figure. (On a long enough time line, survival rates always drop down to zero.)
My take on food? Find out what you like and can process without undesired side effects, and go for it. Just don't overdo it - 'too much' is the very definition of what's bad for you.