Follistatin-344
A peptide that blocks myostatin signaling—discussed for muscle mass but with serious safety unknowns.
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See this name online?
Myostatin inhibitor peptide
Fitness peptides are often sold for “research use”—learn the compound before trusting a label.
Structure (cute edition)
This peptide is a short chain of about 4 amino acids—think of it as a tiny protein necklace on your label.
INCI: Myostatin inhibitor peptide · ~4 amino acids in our simplified view
Research & public records
Counts and links from public databases (PubMed, ClinicalTrials.gov, Wikidata, NIH drug nomenclature). Educational only — not medical advice.
PubMed: 8 indexed papers (search PubMed)
- Safety and Efficacy of Approved and Unapproved Peptide Therapies for Musculoskeletal Injuries and Athletic Performance. · Sports medicine (Auckland, N.Z.)
- Detection of black market follistatin 344. · Drug testing and analysis
- Central serous chorioretinopathy associated with high-dose follistatin-344: a retrospective case series. · International ophthalmology
- Detection of black market follistatin 344. · Drug testing and analysis
- The transgenic expression of human follistatin-344 increases skeletal muscle mass in pigs. · Transgenic research
- Exercise in Myositis. · Current treatment options in rheumatology
- Follistatin Gene Therapy for Sporadic Inclusion Body Myositis Improves Functional Outcomes. · Molecular therapy : the journal of the American Society of Gene Therapy
- Follistatin Gene Therapy Improves Ambulation in Becker Muscular Dystrophy. · Journal of neuromuscular diseases
Clinical trials: 1 studies on ClinicalTrials.gov (view search)
- Phase I: Safety and Efficacy of an Injectable Follistatin Plasmid Gene Therapy in Humans · COMPLETED
- Follistatin Gene Transfer to Patients With Becker Muscular Dystrophy and Sporadic Inclusion Body Myositis · COMPLETED
ChEMBL: CHEMBL3652490
What brands say it does
Follistatin inhibits myostatin, a protein that limits muscle growth. Gene-therapy and peptide approaches have shown dramatic muscle gains in animals. Human use is experimental; long-term safety is not established.
Where you’ll find it
Research-only discussions—not mainstream fitness retail.
Other names you might see
FS344
Myostatin inhibitor peptide
Compare with similar peptides
Similar peptides
Educational only—not medical advice. Many compounds here are banned in sport and not FDA-approved for OTC use.