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 Delta Sleep Inducing Peptide an overview ScienceDirect Topics Phosphorylated delta sleep inducing peptide restores spatial memory and p CREB expression by improving sleep architecture at high altitude ScienceDirect Delta Sleep Inducing Peptide Recovers Motor Function in SD Rats after Focal Stroke