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John Allan Arte gets one-year suspension for tamoxifen metabolite

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Dana White’s Contender Series Brazil: Castro v Arte Photo by Chris Unger/DWTNCS LLC

Brazilian light heavyweight John Allan Arte has accepted a one-year suspension after coming up positive for a banned substance, UFC anti-doping partner U.S. Anti-Doping Agency (USADA) and the promotion jointly announced on Friday.

Arte, 26, failed an in-competition test following his first UFC fight, which took place in July at UFC Sacramento and resulted in a decision win over Mike Rodriguez. USADA said analysis of Arte’s urine sample found metabolites of the banned hormone and metabolic modulator tamoxifen, which carries a one-year suspension for first time offenders. MMAFighting first reported Arte’s drug failure in August.

Tamoxifen’s estrogen-blocking properties can alleviate side effects of anabolic steroid use.

Arte also has been suspended for one year and fined $4,800 by the California State Athletic Commission, which regulated the event at Golden 1 Center. His win over Rodriguez has also been overturned to a no-contest. The USADA and CSAC suspensions are retroactive to the July 13 event and run concurrently.

Following his positive test, USADA said Arte came forward with evidence that he used tamoxifen prior to joining the UFC. Per USADA policy, fighters who enter the drug testing pool prior to their octagon debuts are required to disclose any banned substances they have used in the previous 12 months. Arte did not initially disclose his use on his “onboarding declaration form,” USADA said.

Admission of banned substance use isn’t enough to issue a USADA violation, but depending on the substance, it may delay a fighter’s debut for at least six months and require two clean drug tests.

A veteran of Dana White’s Contender Series, Arte lost via submission to Vinicius Moreira. He inked a UFC deal shortly after beating Alexandre Silva at Future MMA 6 in Brazil.