FS-315 / Activin-Binding Protein
Potent inhibitor of myostatin (GDF-8) and activin. Promotes dramatic muscle growth by blocking the negative regulator of muscle mass. Hypermuscularity demonstrated in animal models.
Binds and neutralizes myostatin, preventing ActRIIB activation. Removes brake on muscle growth. Inhibits activin A. Promotes satellite cell proliferation.
100-200 mcg SC daily. Gene therapy: AAV-follistatin single injection.
Follistatin gene therapy in primates
Follistatin and activin signaling
2-8°C. Do not freeze. Use within 7 days.