Is ACE-031 (ACVR2B-Fc) legal?
ACE-031 (ACVR2B-Fc) is not FDA approved as a finished drug. For drug-tested athletes it is WADA banned (S4). Not prescribed. Development discontinued.. Legal status depends on your country and changes over time. This reflects US status at the time of writing and is not legal or medical advice.
Regulatory status
- FDA: Not FDA approved. Acceleron halted Phase 2 in 2013 due to vascular safety signals.
- WADA: Banned (S4)
- Prescription: Not prescribed. Development discontinued.
References
- ACE-031 (soluble activin receptor IIB) increases muscle mass, Phase 1 in postmenopausal women — Attie KM et al., Muscle Nerve, 2013
- Myostatin inhibitor ACE-031 treatment of ambulatory boys with Duchenne muscular dystrophy: Results of a randomized, placebo-controlled clinical trial — Campbell C, McMillan HJ, Mah JK, et al., Muscle & Nerve, 2017
Pepdex is an editorial reference, not medical advice. Peptides vary in legal and approval status by country, many are research compounds without full human safety data. Talk to a qualified clinician before starting anything.
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Last updated 2026-06-06.