UFC strawweight Iasmin Lucindo has accepted a nine-month suspension handed down by Combat Sports Anti-Doping (CSAD) after testing positive for a banned substance this past September.
CSAD announced her suspension along with details surrounding her case on Tuesday.
“Lucindo tested positive for the presence of mesterolone, a prohibited-at-all-times substance in the class of Anabolic Agents on the UFC Prohibited List, from an out-of-competition sample collected on September 24, 2025, in Feira de Santana, Brazil,” CSAD officials wrote in a statement. “Upon notification of this adverse analytical finding from the laboratory, the UFC immediately removed Lucindo Bezerra from her scheduled bout on December 13, 2025, in Las Vegas, Nevada.”
Lucindo was originally scheduled to face Gillian Robertson on the final UFC event of 2025 before the positive drug test resulted in her beign pulled from the bout.
“Throughout CSAD’s investigation, the evidence collected indicated that Lucindo did not intentionally use mesterolone to gain a performance advantage,” CSAD officials stated. “She cooperated fully with CSAD’s investigation, including submitting to a detailed interview and providing official government documentation from a Brazilian pharmacy where she obtained compounded dietary supplements prior to the adverse finding. The documentation indicated that the pharmacy regularly compounded products containing mesterolone and could not rule out the possibility that legal dietary supplements provided to Lucindo may have been inadvertently contaminated with mesterolone.
“Lucindo Bezerra’s testing history also supported low-level exposure to mesterolone. She provided a negative sample in August 2025, as well as a negative sample in October 2025 in Abu Dhabi, UAE, before she was notified of the adverse finding. The estimated concentration of mesterolone in her September sample was minimal. However, because she had already used up some of the supplements obtained from the Brazilian pharmacy, CSAD was unable to definitively conclude that the low-level adverse finding resulted from a contaminated supplement.”
After the investigation ended, CSAD ultimately opted to suspend Lucindo for nine months given the circumstances surrounding her positive drug test.
“Under the UFC (anti-doping program) CSAD may, in its sole discretion, suspend any portion of a period of ineligibility when an athlete provides full and complete cooperation,” CSAD officials said. “CSAD determined that Lucindo Bezerra met this standard and, when combined with the evidence indicating she did not intentionally use or expose herself to significant quantities of mesterolone, imposed a nine-month period of ineligibility.
“Her suspension began on Sept. 24, 2025, the date the adverse sample was collected, and will conclude on June 24, 2026.”
Lucindo’s team previously told MMA Fighting that they believed a tainted supplement was to blame for the positive drug test after they were notified about the results.
“Iasmin has not knowingly used any prohibited substances and based on the amount and type of the detected metabolites, we firmly believe that this is a case of contamination rather than intentional use,” Lucindo’s team said in a statement. “We are working diligently, in collaboration with Drug Free Sports and the UFC, to identify the source of this contamination.”
In the end, Lucindo was handed a nine-month suspension, but her case still has to go before the Nevada Athletic Commission. She could potentially face a different suspension and/or fine once her case is adjudicated.
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