In February 2014, the Nevada Athletic Commission issued a ban on the use of testosterone replacement therapy among fighters. This meant a major training regimen revamp among those who rely on therapeutic use exemption, such as Vitor Belfort.
In his late 30’s, many deemed Belfort to be at his best during a three-fight string in 2013, when he scored highlight reel knockouts against Luke Rockhold, Michael Bisping, and Dan Henderson, respectively. But once the TRT ban was in place, Belfort’s performance began to take a dip as well, winning only one of his four subsequent fights.