Follistatin is a recombinant protein that binds and neutralizes activin and myostatin, studied in muscle-growth research. It is supplied as a high-purity lyophilized powder in sealed vials for laboratory use. Follistatin is investigated in research on muscle-mass regulation and growth-factor signaling, and is commonly applied in cell-culture and preclinical studies. The lyophilized presentation supports convenient reconstitution and consistent experimental dosing.. Every manufacturing run is QC-checked and batch-specific analysis reports are provided on request. Unopened vials should be kept sealed at 2-8 degree C away from light and moisture, and for longer-term storage -20 degree C is advised while minimizing freeze-thaw exposure. We welcome both sample orders and large quantities, and offer OEM, private-label and secure neutral packing for international shipping. For laboratory research use only.