DSIP Injectable Team Wellcore Therapeutic Peptides in Aesthetic, Metabolic and Endocrine Conditions: Effects, Safety, Clinical Applications, and Future Perspectives Delta Sleep Inducing Peptide an overview ScienceDirect Topics DSIP (Delta SleepInducing Peptide) is a naturally occurring neuropeptide first isolated in 1974. It's best known for its potential role in regulating sleep, stress, and neuroendocrine function. Here's a clear breakdown of DSIP Sleep Peptide Purity 98% French Peptides