Secretin is a 27-amino-acid peptide hormone produced by the small intestine that stimulates pancreatic bicarbonate secretion, studied in gastrointestinal research. It is supplied as a high-purity white lyophilized powder at >=99% HPLC purity in sealed vials. Secretin is investigated in research on gastrointestinal physiology and secretin-receptor signaling, and is commonly applied in cell-based and preclinical studies. The lyophilized format ensures stable reconstitution and consistent experimental dosing. Every batch passes strict quality control, and a Certificate of Analysis is available for specific batches on request. For storage keep the unopened vial sealed at 2-8 degree C protected from light and moisture; for long-term storage store at -20 degree C and avoid repeated freeze-thaw cycles. Both small trial and bulk quantities are accepted, OEM and private-label service is offered, and all shipments use secure neutral packing with worldwide delivery. This product is intended for laboratory research use only.