← The library
Follistatin-344
researchNot a peptide · proteinMuscle/PerformanceEvidence grade
DResearch/compounded/adjunct (no established FDA indication)
Cardiovascular · 0–5 · separate axis
1
PurposeMuscle / Performance
MechanismGlycoprotein that binds and neutralises myostatin and related TGF-beta proteins that limit muscle growth
EffectsTargets the natural brake on muscle growth rather than stimulating growth directly
DosingNo human dose established.
Bottom linePopular in research/compounding; human safety/benefit not well-established.
Batches on filenone
No tested batches on file.
Cautions & interactions
Not FDA-approved; avoid self-administration; unverified sourcing and purity
No well-established interaction profile for non-approved peptides; avoid combining multiple research compounds; discuss meds with clinician.
CV 1 of 5 — No cardiovascular outcomes data; systemic myostatin inhibition has unclear long-term effects including on cardiac muscle.