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.. Each production batch is tested for purity and batch COA is issued upon request. Store the sealed vial at 2-8 degree C, protected from light and humidity; for extended storage -20 degree C is recommended with limited freeze-thaw cycles. Trial orders and bulk supply are both accepted, with OEM and private-label service and discreet neutral packing for worldwide shipping. Research use only, not for human or veterinary application.