Metabolic Category
ACE-031
THE MUSCLE UNLEASHED
ActRIIB-Fc, Soluble Activin Type IIB Receptor Fusion Protein
ACE-031 works by trapping myostatin, your body's natural brake on muscle growth. By neutralizing this signal, your muscles can grow more freely. Originally developed for muscle-wasting diseases, it's now studied for its ability to increase lean mass, strength, and even bone density without the side effects of steroids.
ACE-031 Evidence Snapshot
How these guides are reviewed- Regulatory status
- Not FDA approved · research use only
- Dosing guidance
- No established regimen
- Linked evidence
- 1 research sources
- Content updated
- Oct 7, 2026
Research links are provided so readers can inspect the supporting evidence directly. Review the sources.
Quick Answers About ACE-031
Is ACE-031 FDA approved?
No. This profile records ACE-031 as not FDA approved and for research use only.
More context
Review the regulatory and source details on this page for the current context.
What research supports this ACE-031 guide?
This guide links to 1 curated or current research sources.
More context
Open the research section to inspect the source titles, publication details, study types, and available abstracts directly.
Review the ACE-031 research sourcesWhat are the side effects of ACE-031?
Reported side effects of ACE-031 include Minor nosebleeds, Gum bleeding, and Skin telangiectasias.
More context
They are reported or occasional reactions, not a prediction of what any one person will experience.
Is ACE-031 safe?
ACE-031 has an editorial safety grade of C (Moderate Safety).
More context
Clinical trials were halted due to minor bleeding events. Research compound only. Safety depends on dose, sourcing, health history and medical supervision, so this page does not call it safe for personal use.
Studied Effects & Mechanisms
Myostatin Blocker
Traps myostatin before it can limit muscle growth
Muscle Builder
Enables uninhibited muscle cell growth and hypertrophy
Bone Support
Improves bone mineral density and metabolism
Fat Metabolism
Supports fat burning through improved metabolic efficiency
Who is this for
Bodybuilders looking for non-hormonal muscle support · Athletes recovering from injury or muscle loss · People with age-related muscle decline · Those interested in bone density improvement
ACE-031 price snapshot
In-stock prices from 1 vendor, checked Oct 14, 2026.
- Vendors
- 1
- Listings
- 1
- Observed range
- $181–$181
Market evidence
ACE-031 product testing and COAs
We found certificates from some of the ACE-031 vendors we track. Based on the certificates our crawler found; vendors may publish more than we index. Research on this page describes the molecule. Vendor certificates concern particular market samples or batches; they do not change the research evidence or establish clinical safety, sterility, or suitability for use.
ACE-031 research
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