Oxytocin is a cyclic neuropeptide hormone composed of nine amino acids and synthesized naturally within the hypothalamus for release through neuroendocrine pathways. It has been studied extensively in cognitive and behavioral research for its relationship to social signaling, emotional processing, stress modulation, and affiliative behavioral responses across both human and animal models. Its disulfide-linked cyclic structure is highly conserved across mammalian species and central to its receptor-binding activity. Lyophilized powder, 3mL vial. Sold at 5mg and 10mg per vial. For research use only.