Changes in Prostate-Specific Antigen (PSA) can be used to monitor men supplementing with exogenous testosterone, with most men experiencing less than a half-point increase.

“can use PSA in generally similar Fashions when you're supplementing a man uh on um supplement on exogenous testosterone that is you can look at changes in the PSA most men introverse their PSA did not change it changed less than half a point over the course of the trial”