According to UFC officials, Vitor Belfort is undergoing TRT to treat hypogonadism. Photo by Josh Hedges/Zuffa LLC/Zuffa LLC via Getty Images

Vitor Belfort is under testosterone replacement therapy (TRT) to treat hypogonadism, UFC officials said on Wednesday.

Belfort has been on the medically approved TRT regimen under the supervision of a medical doctor from Nevada, according to the company.

Zuffa, the UFC’s parent company, made the statement to clarify any rumors that Belfort tested positive for banned substances following his UFC on FX 7 win over Michael Bisping.

“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,” the company said in a statement.

One fighter, however, tested positive for banned substances at UFC on FX 7. Thiago Tavares had traces of drostanolone, an anabolic steroid, in his system following the Jan. 19 fights and has been suspended nine months from the date of the fight as a result. He will have to produce a negative test after his suspension before returning to competition.

Hypogonadism is a condition where the sex glands produce little or no hormones. In men, these glands (gonads) are the testes, according to PubMed Health.

No comment has been made by Belfort or his camp at this time.

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