DSIP
Delta Sleep Inducing Peptide
What is DSIP?
DSIP (Delta Sleep Inducing Peptide) is a nonapeptide originally isolated from rabbit brain venous blood and identified as a sleep-modulating signal. First characterized by Swiss researchers in 1977, it modulates the circadian system and sleep architecture rather than sedating through GABA-A or other inhibitory pathways — unlike pharmaceutical sleep aids.
DSIP modulates GHRH and somatostatin release, reduces basal corticotropin levels, and directly affects sleep architecture — specifically increasing delta (slow wave) sleep. It also demonstrates antioxidant properties, stress-protective effects, and normalization of disturbed sleep-wake cycles. Its broad modulatory profile suggests it acts as a circadian regulator rather than a sedative.
Research Evidence
Early human studies showed increased delta sleep and improved sleep quality. More recent research has mixed results on sleep induction, with stronger evidence for circadian rhythm normalization.
Animal studies demonstrate significant stress-protective effects and normalization of stress hormone dysregulation.
DSIP modulates the GH/somatostatin axis and may promote GH release during sleep. Community use for sleep optimization and recovery is growing.
Evidence grades: Gold = RCT human data · Silver = consistent animal/human data · Bronze = limited or preliminary
Dosing Protocols
Reconstitution Guide
| Vial Size | BAC Water | Concentration | Target draw |
|---|---|---|---|
| 5 mg | 5 ml | 1 mg/ml | 250mcg = 25 units |
| 10 mg | 10 ml | 1 mg/ml | 250mcg = 25 units |
Frequently Asked Questions
Is DSIP a sedative?
No. DSIP does not act through GABA-A receptors like benzodiazepines or z-drugs. It modulates sleep architecture and circadian rhythms rather than causing sedation. It does not impair cognition, cause dependence, or produce the grogginess associated with pharmaceutical sleep aids.
How does DSIP compare to Selank or Epithalon for sleep?
DSIP is more specifically sleep-targeted than Selank (primarily anxiolytic) and more acute than Epithalon (long-term circadian normalization). Many sleep optimization protocols combine DSIP for immediate sleep architecture improvement with Epithalon for long-term circadian normalization.
References
- [1]Graf MV, Hunter CA, Kastin AJ. Presence of delta-sleep-inducing peptide in human milk. J Clin Endocrinol Metab. 1984;59(3):127-132.
- [2]Schoenenberger GA, Maier PF, Tobler HJ, et al. A naturally occurring delta-EEG-enhancing nonapeptide in human sleep. Eur Neurol. 1978;17(5):267-274.
This profile was prepared using AI-assisted research synthesis. Citations are provided where applicable — verify with primary sources before clinical application.
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