PeptideCompareFollistatin-344 — the myostatin inhibitor.
Follistatin-344 is a glycoprotein that binds and neutralises myostatin (GDF-8) — the body’s natural brake on muscle growth. It is among the most powerful muscle-growth research compounds and one of the most expensive on PeptideCompare.
What is Follistatin-344?
Follistatin is a naturally occurring protein that binds members of the TGF-beta family, most notably myostatin. Myostatin limits muscle growth; inhibiting it allows greater muscle development — demonstrated dramatically in "double-muscled" animals with myostatin mutations. Follistatin-344 is one isoform studied for this effect. It is a large, complex molecule, which is reflected in its high price.
What does the research show?
What to look for when buying in Europe
Expensive and carried by few EU vendors — PeptideCompare currently tracks limited suppliers. At this price, COA verification is essential. Require ≥98% purity with mass-spec and be cautious of cheap offers.
Potency retained over time
Each line is one storage condition: it starts at 100% and falls as potency is lost. Above the dashed 80% line the material is considered reliable — hover for exact values.
⚠ Estimates modelled per compound from its molecular properties (sequence length, cyclisation, oxidation- and deamidation-prone residues, light sensitivity). Indicative only — not lab-measured per batch.
Compare Follistatin-344 across EU suppliers
1 EU vendors · COA-verified · from €129.00 · Updated monthly