Delta Sleep-Inducing Peptide, commonly abbreviated as DSIP, is a naturally derived nonapeptide neuropeptide first isolated from rabbit brain venous blood. It plays an important role in the modulation of central nervous system activity and sleep architecture. DSIP has been widely applied in preclinical research for sleep rhythm regulation, neuroprotection, stress response and neuroendocrine modulation studies. In preclinical animal models, DSIP exhibits regulatory effects on delta slow-wave sleep, which is closely related to physical recovery, memory consolidation and hormone secretion. Apart from sleep modulation, published research also demonstrates its anxiolytic, anti-oxidative and neuroprotective properties. It can interact with multiple central signaling pathways to relieve stress-induced physiological changes and reduce oxidative damage of nerve cells. DSIP also participates in the regulation of the release of multiple endocrine factors, which makes it a valuable research tool in neuroendocrine related experiments. This research-grade DSIP is manufactured by solid-phase peptide synthesis. Every batch undergoes strict quality control procedures including HPLC purity analysis, mass spectrometry identity verification, water content, heavy metal residual detection and endotoxin test. The lyophilization technology effectively preserves peptide activity and minimizes degradation during transportation and storage. The product is readily soluble in sterile water or bacteriostatic water for laboratory reconstitution. Reconstituted peptide solution should be aliquoted and stored under refrigeration, and repeated freeze-thaw operations must be limited to prevent peptide chain cleavage and activity loss. No extra stabilizers, preservatives or fillers are added into the finished product, ensuring low background interference for in vitro cell tests, tissue incubation and in-vivo preclinical research. Batch-to-batch consistency is guaranteed to support repeated and comparative laboratory research projects.