DSIP (Delta sleep-inducing peptide)

DSIP — Delta sleep-inducing peptide — is a natural nonapeptide whose name reflects its best-known research focus: sleep regulation, including the induction of slow-wave (delta) sleep. It has also been examined in connection with the body's stress response and neuroendocrine signaling. Because the earliest work on DSIP dates back to the 1970s, most of the available evidence comes from small, early-stage studies rather than large modern trials.