A few years ago the Prostate Cancer Foundation put out a Health & Wellness Guide created by several co-authors from UCSF and Harvard which mentions several things about
foods and supplements. I've seen other things elsewhere that are in general agreement, for the most part.
https://www.pcf.org/wp-content/uploads/2016/10/pcf_hw_guide.pdf(My personal challenging aspects are with food portion control and stress eating with Stage IV disease, and with getting enough exercise while feeling the fatigue that has come with 5 1/2 years on Lupron and especially 2 1/2 years of added Xtandi.)
Charles