Testosterone is a primary nutrient for prostate cancer. I'm 73 and have had almost no testosterone for a decade as a result of various drugs and a radical orchiectomy fighting prostate cancer. I still remain extremely active, get my 8-9 hours sleep each day and push through any fatigue. 9 years ago, I was on Androgel to boost testosterone, which ended up accelerating my initial problem by pushing testosterone levels even higher. The DUMBEST advice I ever received. Now, it's a decade later, I'm still here to talk about it. Perhaps a little more tired, but my grandkids still have a grandfather who can still beat them on the tennis court.
Be informed, make good decisions and good luck.