All Niger faget joking aside, if you really have a threat of prostate cancer, you need to go carnivore. For people who present with an enlarged prostate, roughly 80% if they try carnivore will find their prostate shrinking to a normal size. The operative hormone in most cases of prostate enlargement therefore must be insulin. As far as cancer goes, almost all cancers feed on glucose and glycogen. If you can reduce your blood sugar level down, and run off ketones, you hugely reduce the chances of a cancer successfully taking hold and growing.