ACE-031 FAQ: common questions answered
An experimental muscle-growth protein whose Duchenne program stopped over bleeding concerns.
Also called: Ramatercept, ACE031, ActRIIB-IgG1, ActRIIB-Fc.
Myostatin pathway · Soluble activin receptor IIB–IgG1 Fc fusion protein.
- Is ACE-031 FDA-approved? No. Applying FDA’s protein definition to ACE-031 receptor–Fc protein establishes biological-product status. No FDA-approved product was found.
- How do people take it? Into muscle, one reported test session. One session; symptoms reportedly lasted about a day and a half.. Source: reported by users, not an established dose.
- What's the difference between ACE-031 and Ipamorelin? ACE-031: an experimental muscle-growth protein whose Duchenne program stopped over bleeding concerns. Ipamorelin: an experimental peptide that triggers growth hormone release. Why people pair them: suggested alongside ACE-031 in a muscle-gain discussion.
- Can I take it with Ipamorelin? Suggested alongside ACE-031 in a muscle-gain discussion. No human trial has tested this combination. Added growth-signal and product-quality risks are unknown. Source: reported by users. Ask a doctor before combining anything.
- Is it banned in sport? Yes. It is banned in and out of competition (WADA 2026). Named decoy activin receptor; prohibited in and out of competition.
- How do I store it once opened? No validated post-mixing stability or beyond-use period for market products was found.
Related to ACE-031
- Follistatin-344: Human gene-therapy findings do not establish a dose for follistatin-344 protein vials.
- Ipamorelin: An experimental peptide that triggers growth hormone release.
- Hexarelin: A peptide that releases growth hormone; repeated use can weaken the response.
Sources
- 503B Bulk Drug Substances List, FDA · FDA · 2026
- Bulk Drug Substances Nominated for Use in Compounding Under Section 503A of the Federal Food, Drug, and Cosmetic Act, FDA · FDA · 2026
- Bulk Drug Substances Used in Compounding Under Section 503A of the FD&C Act, FDA · FDA · 2026
- Cellulitis, NHS · NHS · 2026
- Find product information about medicines, Medicines and Healthcare products Regulatory Agency · MHRA · 2026
- Medicines, European Medicines Agency · European Medicines Agency · 2026
- Pyrogen and Endotoxins Testing: Questions and Answers, FDA · 2026
- The 2026 Prohibited List, World Anti-Doping Agency · WADA · 2026
- Therapeutic Goods (Poisons Standard—October 2026) Instrument 2026, Australian Government · Australian Government · 2026
- Anaphylaxis, NHS · NHS · 2023
- Definition of the Term “Biological Product” Final Regulatory Impact Analysis, FDA · 2020
- Australian Register of Therapeutic Goods (ARTG), Therapeutic Goods Administration · TGA
- Mixing, Diluting, or Repackaging Biological Products Outside the Scope of an Approved Biologics License Application Guidance for Industry, FDA
- Nosebleed, NHS
- Search criteria - Drug Product Database online query, Health Canada · Health Canada
Sources checked: 2026-10-18.
Information only, not medical advice. Peptifacts does not sell anything and does not link to sellers.