Glucagon is a 29-amino-acid peptide hormone secreted by pancreatic alpha cells that raises blood glucose by promoting hepatic glycogenolysis and gluconeogenesis, making it a central tool in metabolic research. It is supplied as a high-purity white lyophilized powder, >=99% by HPLC, in sealed vials for laboratory use. Glucagon is investigated in research on glucose counter-regulation, hepatic metabolism, energy balance and glucagon receptor signaling, and is commonly applied in cell-based assays and preclinical metabolic studies. The lyophilized form provides excellent stability and reproducible reconstitution for consistent experimental dosing. Each batch is manufactured under controlled quality systems and batch-specific certificates of analysis are obtainable on request. Store the sealed vial at 2-8 degree C away from direct light and humidity; for extended storage keep at -20 degree C and minimize freeze-thaw cycles. Small sample orders and bulk quantities are both welcomed, and we provide OEM, private-label and secure neutral-packaging services for global delivery. Laboratory research use only.