Have you heard of DSIP? In this study, delta sleep induced peptide was given to only 17 participants! But it helped improve their sleep markers.. unfortunately only 17 patients used but they were Frontiers Pichia pastoris secreted peptides crossing the blood brain barrier and DSIP fusion peptide efficacy in PCPA induced insomnia mouse models Melatonin and Sleep Gateway Psychiatric Delta Sleep Inducing Peptide an overview ScienceDirect Topics Do Melatonin Patches Work? What to Know Before You Stick One On