DSIP (Delta Sleep-Inducing Peptide) is a synthetic peptide widely studied in research settings for its potential role in sleep regulation, recovery, stress response, and neuroendocrine activity. Originally investigated for its connection to delta-wave sleep, DSIP has been explored in preclinical and experimental models for its possible effects on sleep quality, circadian balance, and physiological recovery pathways. DSIP is strictly for research use only and not intended for human consumption.