Sleep Peptide • Endogenous Nonapeptide

DSIP: The Sleep-Inducing Peptide

📄 4 PubMed citations

By , HighPeptides Editor

Last updated: March 2026

Delta Sleep-Inducing Peptide is a naturally occurring nonapeptide first isolated from rabbit cerebral venous blood in 1977. It modulates sleep architecture, stress response, and has analgesic properties studied across multiple clinical trials.

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Amino Acid
Sequence Length
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Year First
Isolated
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Clinical Study
IV Dose
📋 On this page
  1. What Is DSIP?
  2. What the Research Shows
  3. Side Effects & Safety Profile
  4. Study Citations
  5. Who Researches DSIP?
  6. Key Takeaways
  7. 🔬 Verified Research Source
  8. Related Resources
Background

What Is DSIP?

DSIP (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) is an endogenous nonapeptide discovered by Schoenenberger and Monnier. Unlike most sleep aids, it doesn't cause sedation — it modulates the natural sleep cycle by promoting delta-wave (slow-wave) sleep stages.

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Sleep Architecture Modulation

Promotes delta-wave (slow-wave) sleep without sedative effects. Modulates the natural sleep-wake cycle rather than forcing unconsciousness like traditional hypnotics.

🧠
Neuroendocrine Regulation

Reduces cortisol and corticotropin-releasing hormone (CRH) levels. Modulates LH and GH secretion patterns, acting as a broad neuroendocrine modulator.

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Analgesic Properties

Interacts with opioid receptor systems to produce analgesic effects. Clinical studies showed significant pain reduction in chronic pain patients over 5-10 day treatment courses.

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Stress Response

Exhibits stress-protective properties by modulating the HPA axis. Research suggests DSIP can limit the adrenal cortex response to ACTH stimulation under stress conditions.

Research

What the Research Shows

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Context: DSIP has been studied in double-blind placebo-controlled trials since the 1980s. Results on sleep are promising but mixed — some trials show significant improvement while others are inconclusive. The analgesic data is more consistently positive.

Chronic Insomnia — Double-Blind Study (16 patients)
Improved sleep efficiency and increased slow-wave sleep vs placebo over 5 nights
Mixed
Chronic Pain — Clinical Pilot (7 patients)
Significant pain reduction in 6/7 patients after IV administration over 5 consecutive days
Positive
Acute and Delayed Sleep Effects — Crossover Design
25 nmol/kg IV infusion showed acute sleep-promoting effects on slow-wave parameters
Positive
Withdrawal Symptom Management
Reports of DSIP aiding opioid and alcohol withdrawal symptoms in observational studies
Preliminary
Safety

Side Effects & Safety Profile

Morning Grogginess
Transient drowsiness reported in some subjects
Mild
Injection Site Reactions
Minor redness or irritation at injection site
Mild
Long-term Safety Data
No comprehensive long-term safety studies published
Unknown
Sources

Study Citations

Clinical Trial
Effects of delta sleep-inducing peptide on sleep of chronic insomniac patients. A double-blind study
Schneider-Helmert D. · Neuropsychobiology, 1987 · PMID: 3583493
Clinical Pilot
Therapeutic effects of delta-sleep-inducing peptide (DSIP) in patients with chronic, pronounced pain episodes
Larbig W, et al. · European Neurology, 1984 · PMID: 6548970
Crossover Study
Acute and delayed effects of DSIP on human sleep behavior
Schneider-Helmert D, Schoenenberger GA. · International Journal of Peptide and Protein Research, 1983 · PMID: 6895513
Double-Blind Study
Effects of delta sleep-inducing peptide on sleep of chronic insomniac patients
Schneider-Helmert D. · Neuropsychobiology, 1992 · PMID: 1299794

Self-Assessment

Who Researches DSIP?

This Research Is Commonly Explored By People Who...

  • Are investigating peptide-based approaches to sleep optimization without traditional sedatives
  • Want to understand endogenous sleep-regulating peptides and their mechanisms
  • Are interested in the connection between sleep architecture, pain, and neuroendocrine function
  • Are exploring alternatives for stress-related sleep disturbances

This Research May Not Be Relevant If...

  • You expect immediate knockout-style sedation — DSIP modulates sleep architecture, not consciousness
  • You want well-established long-term safety data — it doesn't exist for DSIP
  • You need FDA-approved options — DSIP remains investigational
📚

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Bottom Line

Key Takeaways

✅ What We Know
  • Endogenous nonapeptide discovered in 1977
  • Promotes delta-wave sleep without sedation
  • Analgesic effects confirmed in clinical pilot
  • Modulates cortisol and stress response
  • Generally well-tolerated in short-term studies
⚠️ What We Don't Know
  • Not FDA approved — investigational only
  • Sleep results are mixed across trials
  • No long-term safety data available
  • Exact receptor binding profile still debated
  • Optimal dosing protocol not established

🔬 Verified Research Source

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Research Supplies

Tools and supplies relevant to this research area.

💧 Bacteriostatic Water Required for reconstituting lyophilized peptides. 30mL vials standard. 💉 Insulin Syringes (29G) 1mL syringes with 29-gauge needles for subcutaneous injection. 🧴 Alcohol Prep Pads Sterile 70% isopropyl alcohol swabs for injection site prep. 🗑️ Sharps Container FDA-cleared sharps disposal. Never throw needles in regular trash.

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⚠️ Disclaimer

DSIP is NOT FDA approved and is available only for research purposes. This page is for educational purposes only. Not medical advice. Research Only