Enobosarm
Ostarine · MK-2866 · GTx-024 · VERU-024 · Veru
Oral selective androgen receptor modulator studied with semaglutide for lean-mass preservation and weight reduction in older adults with obesity.
Selected study results
QUALITY · 16-week pooled body-composition resultsBody composition during weight management1.2% · 16 weeks · Phase 2b
Lean-mass loss by DXA · primary endpoint · 16 weeks
Less lean-mass loss; similar scale-weight loss in this pooled comparison.
Adults aged ≥60 with obesity or overweight and a weight-related condition · Enobosarm 3 mg or 6 mg daily, pooled; both groups received semaglutide · Trial N=168 · Sponsor-reported descriptive mean changes; pooled efficacy sample 100 active versus 48 placebo; adjusted primary comparison p=0.002. Results & methods ↗
| Measure | Enobosarm + semaglutide | Placebo + semaglutide |
|---|---|---|
| DXA lean mass | −1.2% | −4.1% |
| DXA fat mass | −10.9% | −8.6% |
| Body weight | −4.4 kg | −4.7 kg |
| Participants with ≥10% stair-climb-power decline | 19.4% (98 evaluated) | 42.6% (47 evaluated) |
- Statistical interpretationThe fat-mass comparison had p=0.096; the stair-climb responder comparison had p=0.0049. Table values are descriptive means, while the sponsor’s statistical comparisons used adjusted models. The pooled analysis combines two doses and is not an estimate for 3 mg alone.
- 12-week extension after semaglutide withdrawalWeight regain during the extension was 1.41% with 3 mg, 2.87% with 6 mg and 2.57% with placebo; the 3-mg comparison had p=0.038. These are changes after withdrawal, not total weight loss from the original study baseline. Follow-up source ↗
- Safety disclosureALT elevations were more frequent at 6 mg. See the safety context below and the sponsor’s separate safety report. Follow-up source ↗
The relative reduction in lean-mass loss is not a weight-loss percentage. DXA lean mass is not identical to skeletal muscle or strength. Short-term findings in older adults should not be generalized to all GLP-1 users; PLATEAU must establish longer-term weight and functional outcomes.
Each graphic shows results within one study. Alternate analyses and follow-up from that study are labeled together. Study averages are not individual predictions or cross-trial comparisons.
Safety context
In QUALITY, the sponsor reported mild ALT elevations in 0/56 placebo recipients, 1/56 receiving 3 mg and 6/56 receiving 6 mg. No Hy’s-law liver injury or treatment-related serious adverse events were reported in that disclosure. These short-term findings do not establish long-term safety; the subsequent PLATEAU study uses 3 mg.
Mechanism at a glance
Body-composition and other targets appear alongside hormone pathways in this overview.
Explore the hormone anatomy ↗Obesity stage by formulation
Latest: The Phase 2b PLATEAU trial has enrolled 239 participants. Earlier QUALITY results showed less lean-mass loss, with similar scale-weight loss in the pooled 16-week comparison.
Next: Sponsor expects PLATEAU interim DXA results in Q1 2027 and final topline results in Q4 2027; these are anticipated dates, not reported outcomes.
Clinical study records
Obesity and weight-management studies appear first. Related-condition trials follow by phase, with focus labels to show what each study evaluates. Study stage and results reporting are listed separately. Results summarized above are identified as peer-reviewed or sponsor reported. Otherwise, the label states whether results were posted to a registry or reported in the linked source.
Obesity and weight-management studies
Phase 2 studies2 records
PLATEAU
Weight managementU.S. randomized, blinded study in 239 adults aged 65 or older with BMI ≥35. Enobosarm 3 mg daily or oral placebo, each with weekly semaglutide, for 68 weeks. Primary endpoint: percent body-weight change at week 68; body composition and physical function are additional measures. Registry remains active, not recruiting (last update September 4, 2026).
QUALITY
Weight managementCompleted U.S. randomized study in 168 adults aged 60 or older with obesity or overweight plus a weight-related condition. Enobosarm 3 mg, 6 mg or placebo daily with semaglutide for 16 weeks; primary endpoint: DXA lean-mass change. A further 12-week extension stopped semaglutide and continued the assigned oral treatment. Sponsor results are available; no registry results posted at this check.
