DSIP (delta sleep-inducing peptide) is a nonapeptide first isolated from rabbit cerebral blood and associated with slow-wave sleep regulation, stress adaptation and metabolic recovery in experimental studies. Its role in sleep-wake and neuroendocrine research keeps it in steady demand. This product is a white lyophilized powder at >=99% HPLC purity in a sealed vial. Each batch is documented, and both trial quantities and bulk supply are available with worldwide shipping. For customers outside China, we prepare all export documents, including commercial invoice, packing list and certificate of origin as needed. Our logistics partners cover North America, Europe, Latin America and Asia with tracked services, and we update buyers on the shipment progress until delivery is confirmed.