| Tetrasterone: Increases own testosterone |
| Tetrasterone: No side effects (on the contrary, has many health benefits) |
| Tetrasterone: Legal and containing no banned substances |
| AS: Bringing external testosterone to the body (negative loop effect leads to inhibition of own testosterone production and impotence) |
| AS: Dangerous side effects including heart failure, vascular damage, impotence, hair loss, skin problems |
| AS: Illegal, athletes banned if tested positive |