Oxytocin is a nine-amino-acid cyclic neuropeptide hormone involved in uterine contraction, milk ejection, social bonding and stress regulation, with receptor actions studied across reproductive and behavioral neuroscience. Its wide physiological reach makes it a foundational reference peptide. This product is a white lyophilized powder at >=99% HPLC purity in a sealed vial. We provide batch analysis data, flexible pack sizes and reliable international shipping. Our quality assurance process includes raw material screening, synthesis monitoring and final HPLC analysis, with results documented for each lot. Buyers can request batch-specific information before ordering, and our technical staff can advise on reconstitution, storage and handling for each peptide.