DSIP

DSIP (Delta Sleep-Inducing Peptide) is a nine-amino-acid neuropeptide first isolated from the cerebral venous blood of sleeping rabbits. It is the only peptide named for and characterised by a direct effect on slow-wave (delta) sleep architecture in published human work — no other peptide in the category has equivalent EEG-validated delta-wave evidence. Researched outcomes include increased slow-wave sleep, improved sleep continuity, normalised cortisol rhythm, and improved stress-resilience and recovery markers. Unlike sedative GABAergics it does not suppress REM or compress slow-wave sleep; it deepens what is already there. Most commonly dosed pre-bed in short cycles to avoid tolerance. A core component of the Sleep stack alongside Epithalon, which re-sets the pineal–melatonin clock that schedules the deeper sleep DSIP enables.