By the time the body converts the compounds into the active steroidal form, the benefits of the
steroid are minimal, but the side effects are high. Say for example, you take a prohormone and it breaks down in the liver with a byproduct of about 100mg of testosterone a week. This is only around 25mg more than the body produces naturally. Injecting the real thing gives you 500+mg a week plus more if using a stack and there is no conversion by the body.thats how i understand it..... hope it helps