Actually, it's harder than you think. When my dad got prostate cancer he started eating like it was going out of style. He was a skinny guy until then. He said it was nearly impossible to stop. Eventually as it progressed he then started losing weight no mater what he ate. When he died he weighed about 90 pounds, from a normal weight of 185.
Sorry to read about your dad dying from prostate cancer. I assume by the time his prostate cancer was diagnosed it was at least stage 4 and likely metastasized. If that's right, it is very sad. Early detection saves lives.
I am a prostate cancer survivor. Thanks to being on TRT, I routinely had labs done including checking my PSA. When there was a rapid increase in numbers, a biopsy was done and done again just to be sure. The cancer was caught in the early stages of 1-2 and it was well within the margins of my prostate. I no longer have a prostate and my labs show my PSA as undetectable. I had the prostatectomy around 7 years ago.
After diagnosis while contemplating the choices my doctor proposed, I joined a prostate cancer group. Most of the guys there didn't have a great prognosis. Some had chosen radiation, others chemo, and a few androgen suppression therapy. The group leader, who was also married and was considerably younger than I was, had a prostatectomy and was leading a normal healthy life. His experience influenced my decision.
Prostate cancer is one of the leading causes of death. The American Cancer Society estimates for in 2021 that there will be about 248,530 new cases of prostate cancer and around 34,130 deaths in the U.S. My doctor told me that any man who lives long enough will likely get prostate cancer. -Cheery thought.
