Ranked UFC strawweight Jaqueline Amorim has accepted a six-month suspension after testing positive for Ostarine twice out of competition. Combat Sports Anti-Doping (CSAD), the UFC-funded agency that runs the promotion’s testing program, ruled that a contaminated dietary supplement was to blame.
The positive samples came from tests on July 29 and August 17, 2026. CSAD is treating both as a single violation, which is why Amorim gets the reduced tainted-supplement sentence. Repeat dopers don’t get that deal. The ban is backdated to the second test, so she’s eligible to compete again on February 17, 2027, as MMA Mania first laid out.
According to CSAD’s statement, Amorim gave investigators “full and complete cooperation” under the UFC’s anti-doping policy. The agency said what it found was “consistent with exposure to low-level ostarine contamination rather than intentional use.”
CSAD cited four reasons for that ruling. The first was her testing history. The second was the low amount of Ostarine in both samples. The third is the one that should make every fighter check the cabinet: she was taking several supplements that hadn’t been third-party tested or certified. The fourth was how often Ostarine turns up as a contaminant in supplements around the world. The agency also said the evidence didn’t show the exposure gave her any significant performance advantage.
Familiar company
She joins a long line of fighters caught by the same substance. Former UFC champions Sean O’Malley, Nicco Montano and Josh Barnett have all tested positive for Ostarine traced back to tainted supplements, and so have Marvin Vettori and Daniel Rodriguez. Each of them was out for a few months. A real doping case usually costs a fighter a year or two.
A short ban still hurts, though. A failed test can mean canceled bouts, lost opportunities and smaller paychecks, and the reputational damage tends to last longer than the suspension. Barnett felt that strongly enough to sue for damages, and he eventually asked out of his UFC contract.
Where Amorim stands
Amorim is 31 and holds a 5-2 record inside the Octagon. Her last fight was in May, when she submitted Loma Lookboonmee with a first-round armbar, about as clean a win as a strawweight gets. Before the news broke she had every reason to be building toward a step up in competition.
The ban takes the rest of 2026 off her calendar. With the clock starting on August 17, she misses roughly six months of fight-ready time in her early 30s. Because CSAD cleared her of intentional use, she should come back without the cloud that follows a real doping case, assuming fans actually read past the headline.
My take is that the agency got it right and the lesson is cheap. Low levels, a clean history and full cooperation are what a contamination case is supposed to look like, and CSAD treated it that way. The part that should bother people is the supplements. Fighters keep getting burned by the same compound from the same untested bottles, and certified products already exist. Amorim can buy the tested stuff and still be booked for a card in late February.