Jaqueline Amorim suspended six months for ostarine
The UFC’s anti-doping agency ruled the Brazilian was exposed to a contaminated supplement; she can return in February 2027.
Brazilian UFC strawweight Jaqueline Amorim has been suspended for six months after testing positive for ostarine, a banned anabolic agent. The UFC announced the penalty on Friday, Oct. 16, in a statement from CSAD, the agency that runs the promotion’s anti-doping program. The suspension is backdated to Aug. 17, and the Jiu-Jitsu black belt from Manaus, Brazil, is eligible to return on Feb. 17, 2027.
What CSAD found in Amorim’s tests
Ostarine showed up in two out-of-competition samples collected in Fort Lauderdale, Florida, where Amorim lives: one on July 29 and another on Aug. 17. Because the second sample was collected before she was notified of the first result, both findings were treated as a single violation.
CSAD concluded the findings were “consistent with exposure to low-level ostarine contamination rather than intentional use.” The agency pointed to her testing history, the low levels found in both samples and her use of several dietary supplements that were not third-party tested.
CSAD also said it saw no sign of a significant performance advantage and that Amorim fully cooperated with the investigation. She accepted the penalty. According to MMA Junkie, she had not commented publicly when the suspension was announced.
Jaqueline Amorim’s UFC career
At 31, Amorim is 11-2 as a pro and 5-2 in the UFC. All 11 of her wins are stoppages, nine of them by submission and five of those by armbar.
She last fought on May 30 at UFC Macau, where she submitted Thailand’s Loma Lookboonmee with an armbar at 4:04 of the first round. That win came after a unanimous decision loss to Japan’s Mizuki at UFC 321 in October 2025, which snapped a four-fight winning streak.
Before joining the UFC in 2023, she was the LFA strawweight champion and defended the belt once. She trains at American Top Team in Florida.
The Jiu-Jitsu behind Amorim’s submissions
Amorim started Jiu-Jitsu at age 6 in Manaus. She is a second-degree black belt, won multiple IBJJF world titles at the colored belts and took a No-Gi Pan title at black belt.
That ground game shows up in her UFC numbers: she averages 4.27 submission attempts per 15 minutes. Her division also has another Jiu-Jitsu black belt at the top, since strawweight champion Mackenzie Dern built her name on the mats before moving to MMA.
Ostarine in MMA and Jiu-Jitsu
Ostarine is a familiar name in combat sports drug testing. In 2018, Sean O’Malley was pulled from UFC 229 after testing positive for the substance and blamed a tainted caffeine pill. According to MMA Mania, Marvin Vettori, Nicco Montano and Josh Barnett also received short suspensions in similar cases.
In Jiu-Jitsu, the best-known case is Kaynan Duarte, who was suspended for one year for ostarine at the 2019 Worlds. USADA cut his penalty by a year after concluding the positive came from cross-contamination by a product belonging to someone close to him.
Earlier this month, VF Comunica also reported on Ketlen Vieira’s six-month suspension, handed down by the PFL’s anti-doping program after her fight against Cris Cyborg. With her suspension, Amorim is out for the rest of the 2026 season.
What do you think: is six months a fair penalty for contaminated supplement cases, or should the UFC be tougher? Let us know in the comments.
Read more:
- The Kaynan Duarte case: ostarine at the 2019 Worlds and a one-year suspension
- Ketlen Vieira suspended for doping after Cris Cyborg fight
