I wonder how much effect, if any, food and drugs have on increased incidence of breast cancer. It seems like it's more common now than it was 40+ years ago. Of course there could be many reasons for my perceiving that but lifestyles have changed a lot in the last several decades. Smartphone usage, hormones/RBST injected into cows, for example. I remember reading that the hormones that cows are injected with has led to girls hitting puberty quicker. Not to mention how many women I have seen shoving their phones in their cleavage. That cant be good for you.

Just all speculation though, I have not done any research on this at all.