Follistatin 344

10 Vials of 1mg or 2mg Follistatin 344 – Lab-tested, high-purity myostatin-inhibiting glycoprotein. Supports muscle growth, tissue regeneration, and metabolic pathway research with secure payment and fast, discreet shipping.

Follistatin 344 is a 344-amino acid glycoprotein that acts as a potent inhibitor of the TGF-β superfamily, primarily targeting myostatin and activins. By binding and neutralizing these proteins, it removes their suppressive effects on muscle growth, leading to increased muscle mass, hypertrophy, and regeneration in preclinical studies. It is also involved in regulating cell proliferation, differentiation, tissue repair, and reproductive signaling. 

Unlike selective myostatin inhibitors, Follistatin 344 simultaneously blocks multiple ligands, resulting in more pronounced effects on muscle growth. It has been studied in models of muscular dystrophy, sarcopenia, and tissue fibrosis, showing improved muscle strength and reduced inflammation. The full-length isoform (FS-344) is processed in vivo to FS-315 and is used in research for its stability and broad signaling modulation.