Delta Sleep-Inducing Peptide, or DSIP, is a synthetic peptide developed with the intention to regulate several systems and maintain normal endogenous functions. DSIP may not only regulate sleep cycle, as suggested by its name but may also play a role in regulating various physiological processes. DSIP is a nine amino acid-containing nonapeptide, endogenously found in neurons, plasma, and peripheral organs. Suggested to induce delta sleep in mammals, this neuropeptide also appears to possibly impact electrophysiological activity and possibly regulate the neurotransmitter levels in the brain.
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