Exogenous testosterone use can be detected by specific molecular markers and suppressed pituitary hormones.

“if a person takes exogenously Ostrom you can look for pear molecules you can look for epi testosterone and if that's not rising at the levels of test run you know they're taking it exhaustion see and you can look at other hormones that get suppressed when you take testosterone so if you're taking testosterone exogenously from outside the body the pituitary hormones that tell the body to make it luteinizing hormone follicle so measurement they go down”