The Peptide AppField Guide · Metabolic SeriesSpecimen No. 031

Metabolic Category

ACE-031

Name: ACE-031: Uses, Evidence & Safety
Creator: The Peptide App
Published: 2026-01-27T18:38:35.818468+00:00

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

ACE-031 Evidence Snapshot

How these guides are reviewed

Regulatory status: Not FDA approved · research use only
Dosing guidance: Reviewed by our clinical team
Linked evidence: 1 research sources
Content updated: Aug 28, 2026

Dose and schedule recommendations shown below come from The Peptide App Clinical Team. 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 dose does The Peptide App Clinical Team recommend for ACE-031?

Dose: 100-200 mcg, 1-3 times per week.

More context

Schedule: daily. Cycle: 4-8 weeks on, then 4-8 weeks off. This is clinical-team guidance for reference and does not replace individualized instructions from a licensed clinician.

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 sources

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 Dosing

Dosage

100-200 mcg, 1-3 times per week

Schedule

daily

Cycle

4-8 weeks on, then 4-8 weeks off

Clinical Team Note

Subcutaneous or intramuscular injection; long half-life (10-15 days) allows infrequent dosing

Get your exact syringe units with the ACE-031 reconstitution calculator

Clinical Team Dosing Guidance

Reported Timeline

Week 1-2

Initial systemic response, no visible changes yet

Week 3-4

Beginning to notice increased strength and recovery

Week 5-6

Visible muscle fullness and improved workout capacity

Week 7-8

Peak effects with noticeable lean mass gains

Muscle gains typically become noticeable by week 4-6.

Timelines summarize reported or expected patterns and are not guaranteed individual outcomes.

Clinical Safety Context

Moderate Safety

Editorial grade C · Moderate

SafetyCModerate

FDA approval statusNo · research use only

Clinical trials were halted due to minor bleeding events. Research compound only.

Development was paused after Phase II trials. Not approved for human use. Requires medical supervision.

Possible side effects

Minor nosebleeds · Gum bleeding · Skin telangiectasias

How to interpret safety grades

The Peptide App

Set up your ACE-031 schedule

Dose reminders and your schedule, ready the moment you open the app.

Research-Market Price Snapshot

A compact market signal for this profile. The dedicated pricing page owns vendor, vial-size, and price-per-mg comparisons.

Updated Aug 30, 2026

Vendors: 1
Listings: 1
Observed range: $181–$181

Compare all ACE-031 prices →

Market evidence

ACE-031 product testing and COAs

Current certificates are on file for 8 of 11 vendors tracked in the ACE-031 market. 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.

View vendor COAs and pricing →Testing database How to read a COA