Former UFC champion Vitor Belfort was granted an exemption to use testosterone replacement therapy prior to his win over Michael Bisping in Brazil last month.

UFC officials released the information concerning Belfort after many pegged the fighter as the one who failed a post-fight drug test. That test belonged to Thiago Tavares, who was suspended for nine months.

To dispel rumors that have been circulated, Zuffa wishes to clarify that Vitor Belfort’s drug test results were negative and did not indicate the presence of any performance enhancing drugs.

Belfort has been on a medically approved testosterone replacement therapy (TRT) regimen under the supervision of a medical doctor from the State of Nevada, after being diagnosed with hypogonadism, or low testosterone. The purpose of a medically administered TRT regimen is to allow patients with hypogonadism to maintain testosterone levels within a range that is normal for an adult male.

Belfort tested positive for a banned substance back in 2006 by the Nevada Athletic Commission.