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 Has anyone used dsip for sleep? SEMAX SELANK DSIP Blend Beverly Hills Rejuvenation Center DSIP Peptide UK Delta Sleep Inducing Peptides Lab UK DOS Days Half Life Buy DSIP (Delta Sleep Inducing Peptide) Peptide Works