Sleep ⏱ Half-life: Short plasma half-life (minutes), but sleep-modulating effects persist for hours, suggesting downstream neuromodulatory cascades. Experimental

DSIP

Delta Sleep-Inducing Peptide

Updated March 15, 2026
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Evidence at a Glance

Regulatory statusExperimental
Nonapeptide studied since the 1970s; never approved anywhere; small double-blind human insomnia trials showed weak, conflicting results.
Human evidenceLimited
Animal evidenceModerate

DSIP has decades of animal work and a handful of small human sleep studies, but controlled trials found its effects too weak and inconsistent to be clinically meaningful, and it remains unapproved.

What the research does not support

  • It is not an approved sleep aid; double-blind insomnia trials judged its benefit weak and of little clinical significance.
  • Despite its name, it does not reliably induce deep (delta) sleep in humans; the name derives from early rabbit experiments.
  • Its true endogenous role and mechanism in humans remain unclear and unproven.
Half-Life
Short plasma half-life (minutes), but sleep-modulating effects persist for hours, suggesting downstream neuromodulatory cascades.
Mol. Weight
848.82 g/mol

What is DSIP?

DSIP (Delta Sleep-Inducing Peptide) is a naturally occurring neuropeptide with a unique mechanism — rather than acting as a sedative, it appears to normalize and optimize sleep architecture, particularly promoting the restorative delta (slow-wave) sleep phase.

Research Applications

Sleep architecture research, stress response modulation, cortisol regulation, chronic pain studies, and withdrawal management models.

Dosage Information (Research Use)

Research protocols: 100-300 mcg subcutaneously or IV, typically administered in the evening. Course-based protocols (10-14 days) documented in European clinical research. Research use only.

Reconstitution & Handling

Standard BAC water reconstitution.

Half-Life & Pharmacokinetics

Short plasma half-life (minutes), but sleep-modulating effects persist for hours, suggesting downstream neuromodulatory cascades.

Reported Observations in Literature

Generally well-tolerated. Does not produce next-day sedation or cognitive impairment. No dependence or tolerance reported in available literature.

Key Research References

  • Schoenenberger GA, Monnier M. “Characterization of a delta-electroencephalogram-sleep-inducing peptide.” Proc Natl Acad Sci USA. 1977

How DSIP Works

DSIP is a nine-amino acid neuropeptide first isolated from rabbit brain during electrically-induced sleep studies. Unlike sedative/hypnotic drugs, DSIP does not force sleep — rather, it modulates sleep architecture by promoting delta (slow-wave) sleep patterns. Additional mechanisms include modulation of corticotropin and cortisol levels, LH/GH release normalization, and possible endogenous opioid system interactions.

Research Findings

Research shows improved sleep onset, increased delta wave percentage during sleep, and normalization of disrupted sleep patterns without morning grogginess. Also studied for stress tolerance, alcohol withdrawal support, and chronic pain management in European clinical settings.

Dosage & Administration

Research protocols: 100-300 mcg subcutaneously or IV, typically administered in the evening. Course-based protocols (10-14 days) documented in European clinical research. Research use only.

Safety & Side Effects

Generally well-tolerated. Does not produce next-day sedation or cognitive impairment. No dependence or tolerance reported in available literature.

Important: All safety information is derived from published research, primarily animal studies. No controlled human clinical trial data exists unless explicitly noted. This compound is sold for research purposes only.

Quick Facts

Sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu
Molecular Weight 848.82 g/mol
Half-Life Short plasma half-life (minutes), but sleep-modulating effects persist for hours, suggesting downstream neuromodulatory cascades.
Available Sizes 5mg
Storage Lyophilized: -20°C. Reconstituted: 2-8°C.

Key Research References

  • Schoenenberger GA, Monnier M. "Characterization of a delta-electroencephalogram-sleep-inducing peptide." Proc Natl Acad Sci USA. 1977

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