Delta Wave Sleep Architecture & Stress-Protective Neuropeptide
DSIP — Delta Sleep-Inducing Peptide
DSIP (Delta Sleep-Inducing Peptide) is a neuropeptide first isolated from rabbit cerebral venous blood in 1977. It is a nonapeptide (9 amino acids) that modulates sleep architecture, specifically promoting delta (slow-wave) sleep. Beyond sleep, DSIP has demonstrated stress-protective, antioxidant, and neuroendocrine-modulating properties in preclinical and early clinical research.
DSIP is a 9-amino-acid nonapeptide (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) with a molecular weight of 848.9 Da. Its small size allows it to cross the blood-brain barrier, enabling direct central nervous system activity. It is naturally produced in the hypothalamus and released into the portal blood.
DSIP modulates GABAergic neurotransmission in the thalamus and cortex, promoting the transition to slow-wave (delta) sleep. It also reduces corticotropin-releasing hormone (CRH) secretion and normalizes cortisol rhythms, providing stress-protective effects. Additionally, it scavenges reactive oxygen species and upregulates endogenous antioxidant enzymes.
DSIP (Delta Sleep-Inducing Peptide) is a 9-amino-acid neuropeptide discovered in 1977 that promotes deep, slow-wave (delta) sleep. It has been studied in human clinical trials for insomnia and chronic pain, with a favorable safety profile.
DSIP modulates GABAergic neurotransmission in the thalamus to promote delta wave sleep, reduces stress hormones (CRH and cortisol) that interfere with sleep, and provides antioxidant protection in the brain.
Chronic sleep deprivation is linked to Alzheimer's disease, metabolic syndrome, and cardiovascular disease. Most sleep aids suppress deep sleep rather than enhancing it. DSIP promotes delta wave sleep while reducing stress hormones.
DSIP is a neuropeptide that promotes deep sleep through GABAergic and HPA axis modulation, with human clinical trial data supporting its safety for insomnia research.
Modulates GABAergic neurotransmission in the thalamus and cortex, promoting the transition to slow-wave (delta) sleep and increasing sleep depth and duration.
Reduces corticotropin-releasing hormone (CRH) secretion and normalizes cortisol rhythms, providing stress-protective effects and improving sleep quality in stress-induced insomnia models.
Scavenges reactive oxygen species and upregulates endogenous antioxidant enzymes, providing neuroprotective effects in oxidative stress models.
Cognitive Research
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| Peptide Class | Neuropeptide (9 amino acids) |
| Molecular Weight | 848.9 Da |
| Regulatory Status | Research chemical; no clinical approval |
| Sequence | Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu |
| Available Sizes | 2mg, 5mg vials |
| Form | Lyophilized powder |
| Purity | ≥99% (third-party tested) |
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Purchase DSIP at Purgo LabsMedical Disclaimer: All content on this site is for educational and research purposes only. Research peptides are not FDA-approved for human use. Always consult a qualified healthcare professional before considering any peptide or supplement protocol. Nothing on this site constitutes medical advice, diagnosis, or treatment.
