Delta Sleep Inducing Peptide (DSIP) 62568 57 4 PDS 4054 V Matt Walker A sleep molecule that promised to boost deep sleep? It seemed too good to be true. Sadly, it was. 'Delta sleep inducing peptide was just a Instagram Particle DSIP (Delta Sleep Inducing Peptide) DSIP is a naturally occurring neuropeptide that has attracted the attention of researchers for decades due to its association with sleep cycles, neuroendocrine mechanisms, and Is DSIP Delta Sleep Inducing Peptide Safety?_Chemicalbook