http://www.mixedmartialarts.com/news...-match-for-me/

Vitor Belfort has openly admitted to prescribing to testosterone replacement therapy and the media and fans are split on whether or not it should be allowed. However, Belfort believes it only evens the playing field:

The TRT, the shot just gets you level in the system. So, the bottom line my level is always lower than a regular guy. I never go [over] the limit, the level. So, what I'm trying to do, I'm just trying to be fair in my career against my opponent. The TRT is just something my body cannot produce. I'm doing the treatment with doctors, with bloodwork, so everything's pretty black and white. But, all of guys are out there doing a lot of stuff but they don't get caught because they don't have blood.