DSIP 5mg/10mg

The peptide that defined sleep research.

Delta Sleep-Inducing Peptide (DSIP) isn’t just another research peptide—it’s a piece of scientific history. First isolated in 1977 from the cerebrospinal fluid of rabbits during slow-wave sleep, DSIP was the first endogenous sleep substance to have its chemical structure fully elucidated . For over four decades, this nonapeptide has been the subject of intense investigation, with researchers uncovering its remarkable influence on sleep architecture, stress response, and neuroendocrine function. Order DSIP For Sale Online

What makes DSIP unique is its natural approach to sleep modulation. Unlike traditional sedatives that artificially depress central nervous system activity, DSIP appears to work with the body’s own regulatory systems—influencing neurotransmitter balance, circadian rhythms, and stress adaptation without causing dependency or next-day cognitive impairment .

When you order DSIP for sale online, you’re accessing a peptide with documented effects across multiple research domains: sleep regulation, stress protection, neuroprotection, pain modulation, and endocrine support. Its ability to cross the blood-brain barrier easily makes it particularly valuable for neuroscience research. Order DSIP For Sale Online

At Pinecrest, our DSIP:

• Tests at 99%+ purity (HPLC verified)

• CAS Number: 62568-57-4

• Molecular Formula: C₃₅H₄₈N₁₀O₁₅

• Molecular Weight: ~848.82 g/mol

• Amino Acid Sequence: Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu

• Delivered as lyophilized white powder

• Available in standard research quantities

• Includes batch-specific Certificate of Analysis

• Ships from our China facility to your USA door in 5–7 days

• Backed by our 100% purity guarantee

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WHAT IS DSIP?

Delta Sleep-Inducing Peptide (DSIP) is a naturally occurring neuropeptide composed of nine amino acids with the sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu . It was first isolated and characterized from the extracorporeal dialysate of venous blood from rabbits during electrical stimulation of the interlaminar thalamus, a procedure that induced delta wave sleep patterns .

Molecular Identity

Discovery and Historical Significance

The discovery of DSIP marked a turning point in sleep research. In 1977, researchers successfully isolated and purified a peptide compound with hypnotic activity from the cerebrospinal fluid of sleep-deprived rabbits . When injected intravenously into recipient rabbits, it promoted slow-wave sleep and specifically enhanced delta wave activity—hence its name .

DSIP was the first sleep substance to have its chemical structure fully characterized, which sparked intense interest in the scientific community and led to rapid investigation of its structure-activity relationships and the synthesis of numerous analogues .

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MECHANISM OF ACTION: HOW DSIP WORKS

GABAergic System Modulation

DSIP’s primary mechanism of action is believed to involve modulation of the GABAergic system, which plays a key role in promoting relaxation and sleep . The peptide binds to specific receptors in the brain involved in sleep regulation and may increase the production or release of the neurotransmitter gamma-aminobutyric acid (GABA) .

GABA is an inhibitory neurotransmitter that reduces neuronal excitability and slows brain activity, leading to a state of relaxation that helps induce sleep . By enhancing GABA activity, DSIP promotes sleep, particularly non-REM sleep—the deep, restorative stages essential for physical and mental recovery. Order DSIP For Sale Online

Neurotransmitter Balancing

Recent research using PCPA-induced insomnia mouse models has demonstrated DSIP’s capacity to modulate multiple neurotransmitter systems . Studies show DSIP influences levels of:

• 5-HT (Serotonin): Key regulator of mood, sleep, and appetite

• Glutamate: Primary excitatory neurotransmitter

• Dopamine (DA): Involved in reward, motivation, and motor control

• Melatonin: Master circadian hormone

Importantly, DSIP-CBBBP (a fusion peptide designed to enhance blood-brain barrier penetration) showed better restorative effects than DSIP alone on neurotransmitter imbalance, suggesting enhanced therapeutic potential .

Blood-Brain Barrier Penetration

DSIP crosses the blood-brain barrier more easily than most known neuropeptides , which is essential for its central nervous system effects. This characteristic makes it particularly valuable for research applications targeting brain function.

Recent advances have explored fusion peptides combining DSIP with cell-penetrating peptides like Tat (sequence YGRKKRRQRRR) to further enhance delivery across the BBB . These engineered peptides show promise for creating more robust and easily functional forms of DSIP for research applications. Order DSIP For Sale Online

HPA Axis Regulation

DSIP acts as a stress-limiting factor, modulating the hypothalamic-pituitary-adrenal (HPA) axis . It has been shown to:

• Decrease basal corticotropin (ACTH) levels

• Block stress-induced ACTH release

• Reduce cortisol fluctuations

• Alleviate stress-induced metabolic and functional disorders

This stress-protective action contributes to its sleep-promoting effects by creating a more conducive physiological environment for rest .

Circadian Rhythm Influence

DSIP interacts with other signaling molecules involved in circadian rhythms, including serotonin and melatonin . Research has demonstrated that DSIP can influence and even generate circadian rhythms as measured by locomotor activity in the absence of external time cues (Zeitgebers), such as in rats under continuous light conditions . Additionally, DSIP affects the enzymatic activity of serotonin-N-acetyltransferase, a pineal enzyme with strong circadian rhythmicity. Order DSIP For Sale Online

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CLINICAL EVIDENCE: WHAT THE RESEARCH SHOWS

Sleep Regulation Research

The foundational research on DSIP established its sleep-promoting properties. Early studies by Schoenenberger and Monnier (1977) characterized DSIP’s role in sleep modulation, demonstrating its ability to induce delta wave activity in animal models .

A 2024 study published in Frontiers in Pharmacology investigated DSIP-CBBBP (a fusion peptide designed to enhance blood-brain barrier penetration) in PCPA-induced insomnia mouse models . Key findings included:

• DSIP-CBBBP demonstrated capacity to modulate neurotransmitter levels (5-HT, glutamate, DA, and melatonin)

• The fusion peptide showed better restorative effect than DSIP alone on neurotransmitter imbalance

• Enhanced potential to improve sleep architecture

The study concluded that DSIP-CBBBP shows promise in “correcting neurotransmitter dysregulation and promoting sleep, hinting at its utility in sleep-related therapies” . Order DSIP For Sale Online

Stress and Neuroprotection Research

DSIP has been extensively studied for its stress-protective effects. Research demonstrates that DSIP acts as a stress-limiting factor, reducing damage from environmental stressors and helping maintain physiological homeostasis during challenging conditions .

Studies have shown DSIP’s neuroprotective properties include:

• Protection against various neural insults

• Enhancement of oxidative phosphorylation in mitochondria

• Antioxidant effects that may protect against oxidative stress

• Geroprotective effects that slow age-related changes and potentially increase maximum life span in certain studies

Pain Modulation Research

DSIP has demonstrated analgesic properties in multiple studies . Its pain-modulating effects appear to involve:

• Interaction with opioid receptor systems

• Enhancement of enkephalin-opioid receptor interactions

• Potential applications in chronic pain management as an adjunct treatment

Endocrine Effects

Research has revealed DSIP’s influence on multiple endocrine pathways :

• Inhibition of thyroid-stimulating hormone (TSH) secretion

• Suppression of somatostatin (growth hormone inhibin)

• Stimulation of luteinizing hormone (LH) release

• Modulation of growth hormone (GH) and growth hormone-releasing hormone (GHRH)

These endocrine effects contribute to DSIP’s characterization as a multifunctional neuroregulatory peptide .

Addiction Research

DSIP has shown intriguing effects in addiction models :

• Anti-alcohol and anti-opium activities

• Inhibition of dependence on alcohol and opiates

• Potential for treating withdrawal syndromes

Clinical trials have investigated DSIP’s use in treating withdrawal syndromes, with promising results .

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EMERGING RESEARCH DIRECTIONS

Recent 2025-2026 Developments

Neuroprotection in Neurodegenerative Disease Models: A 2025 study by Zhang et al. investigated DSIP’s neuroprotective effects in Aβ-induced neuronal damage models of Alzheimer’s disease. Results showed DSIP reduced β-amyloid-induced neurotoxicity and improved mitochondrial function, suggesting potential applications in neurodegenerative disease research .

Anxiety and Stress Regulation: Li et al. (2023) demonstrated in chronic restraint stress rat models that DSIP intervention significantly upregulated hippocampal BDNF expression and enhanced synaptic plasticity, providing mechanistic insight into its anxiolytic effects .

Circadian Rhythm Modulation: Smith et al. (2024) revealed DSIP’s role in modulating circadian rhythms via hypothalamic GABAergic signaling, opening new avenues for research into shift work disorder and jet lag. Order DSIP For Sale Online

Ongoing Research Areas

Current investigations are exploring DSIP’s potential in:

• Metabolic regulation: Preliminary evidence suggests DSIP may participate in glucose metabolism and energy balance regulation

• Immune modulation: Interactions with pro-inflammatory cytokines (IL-6, TNF-α) in neuroimmune crosstalk

• Cancer research: Potential anti-tumor effects through immune modulation

• Major depressive disorder: As a therapeutic target for treatment-resistant depression

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PRODUCT SPECIFICATIONS

Available Sizes:

• 5 mg vial

• 10 mg vial

• 25 mg vial

• 50 mg vial

• 100 mg vial

• Bulk quantities available upon request

Our advantage: We exceed industry standards on purity, ensuring your DSIP research yields consistent, reliable results. Third-party testing confirms identity, purity, and peptide content. Order DSIP For Sale Online

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ANALYTICAL TESTING: PROVEN BY DATA

Every batch of our DSIP undergoes rigorous quality control testing:

1. Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC)

• Quantifies purity with precision

• Visual chromatogram provided

• Identifies and quantifies individual impurities

• Our standard: ≥99.0%

2. Mass Spectrometry (MS)

• Confirms exact molecular weight (~848.82 g/mol)

• Verifies sequence integrity

• Ensures correct structural identity

3. Amino Acid Analysis

• Confirms correct amino acid composition

• Validates sequence fidelity

• Ensures batch-to-batch consistency

4. Endotoxin Testing

• Ensures ≤10 EU/mg

• Safe for research applications

• Verified by validated methods

5. Peptide Content Determination

• Quantifies net peptide content

• Accounts for counterions and moisture

• Ensures accurate experimental dosing

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STABILITY AND HANDLING

Storage Requirements

Critical handling notes :

• Lyophilized peptides are stable at room temperature for up to 3 months but should be stored desiccated below -18°C for long-term stability

• Upon reconstitution, store at 4°C for 2-21 days

• For future use beyond 21 days, store below -18°C

• Avoid repeated freeze-thaw cycles

• Protect from light and moisture

Reconstitution Guidelines

For research purposes, DSIP is soluble in sterile water, bacteriostatic water, or aqueous buffers at concentrations up to 5 mg/ml .

Recommended protocol :

1. Centrifuge vial briefly to ensure powder is at bottom

2. Reconstitute with sterile water or bacteriostatic water

3. Gently swirl—do not vortex (peptides are fragile)

4. For extended studies, prepare sterile aliquots to avoid repeated freeze-thaw cycles

5. Allow complete dissolution before use; solution should be clear with no particulates

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TYPICAL RESEARCH APPLICATIONS

Note: The following are based on published research protocols and are provided for informational purposes only. All products are for research use only—not for human consumption. Order DSIP For Sale Online

Sleep Research

• Insomnia models: PCPA-induced insomnia studies

• Sleep architecture: Investigating slow-wave sleep mechanisms

• Circadian rhythm: Zeitgeber-free rhythm generation studies

• Sleep disorders: Narcolepsy, sleep apnea research models

Research protocols: The 2024 Frontiers study used DSIP-CBBBP at 100 nM dosage in PCPA-induced insomnia mouse models administered for five consecutive days .

Stress Research

• HPA axis regulation: Stress-induced ACTH and cortisol studies

• Chronic stress models: Restraint stress paradigms

• Stress adaptation: Physiological response to environmental stressors

• Anxiety research: Elevated plus maze, open field tests

Neuroprotection Research

• Neurodegenerative disease models: Aβ-induced neurotoxicity in Alzheimer’s research

• Oxidative stress: Mitochondrial function and antioxidant studies

• Excitotoxicity: Glutamate-mediated neuronal damage models

Pain Research

• Analgesic mechanisms: Opioid receptor interaction studies

• Chronic pain models: Neuropathic and inflammatory pain paradigms

• Addiction research: Opioid and alcohol dependence models

Endocrine Research

• Hormone regulation: Pituitary hormone secretion studies

• Reproductive endocrinology: LH and gonadotropin research

• Growth hormone axis: Somatostatin and GHRH interactions

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RESEARCH SUMMARY TABLE

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SAFETY AND REGULATORY STATUS – Order DSIP For Sale Online

Current Regulatory Status

DSIP is a research peptide intended for laboratory use only. It is not FDA-approved for any therapeutic indication and is not intended for human consumption .

Safety Profile from Research Studies

Based on available preclinical data :

• Preclinical safety: Studies show minimal side effects with no obvious toxicity in animal models at research doses

• Clinical research: Limited human studies have been conducted; human clinical application requires further verification

• Tolerability: Generally well-tolerated in research models at tested doses

Reported Side Effects

Based on available literature, side effects are rare but may include :

• Headache

• Hypotension (low blood pressure)

• Vagal reactions (dizziness, ringing ears, sweating)

• Vomiting

• Injection site reactions (swelling, irritation, redness, nodules, pain, discomfort, discoloration)

Important Considerations for Researchers

The safety and long-term effects of DSIP have not been extensively studied in large-scale clinical trials . Points to consider :

• Individual variability in responses may occur

• Synthesis quality affects activity; purity and sequence accuracy are critical

• Long-term effects in humans are not well-documented

• Interactions with other compounds are not thoroughly studied

Research Use Only

Our DSIP is sold for laboratory research purposes only. It is:

• Not for human consumption

• Not for diagnostic or therapeutic use

• Not FDA-approved for any indication

• Intended for in vitro studies and analytical applications

• For researchers aged 21+ only

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ORDERING INFORMATION

Each order includes:

• Batch-specific Certificate of Analysis

• HPLC chromatogram (upon request)

• Mass spectrometry confirmation (upon request)

• Lot number for full traceability

• Vacuum-sealed, desiccated packaging

• Temperature-stable international shipping

Shipping to USA: 5–7 business days (typical)

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DSIP FREQUENTLY ASKED QUESTIONS

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Q: What does DSIP stand for?

A: DSIP stands for Delta Sleep-Inducing Peptide, named for its ability to promote delta wave sleep activity in early research studies .

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Q: What is the amino acid sequence of DSIP?

A: The sequence is Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu .

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Q: What is the CAS number for DSIP?

A: The CAS number is 62568-57-4 .

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Q: What is the molecular weight of DSIP?

A: The molecular weight is approximately 848.82 g/mol (C₃₅H₄₈N₁₀O₁₅) .

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Q: What purity should I expect for research-grade DSIP?

A: Research-grade DSIP should be ≥95-98% purity by HPLC analysis . Pinecrest’s DSIP is ≥99% with full documentation, including third-party testing.

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Q: How does DSIP cross the blood-brain barrier?

A: DSIP crosses the blood-brain barrier more easily than most known neuropeptides , making it particularly valuable for CNS research. Recent research has explored fusion peptides with cell-penetrating sequences like Tat to further enhance delivery .

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Q: What are the main research applications for DSIP?

A: DSIP is primarily studied for sleep regulation, stress modulation, neuroprotection, pain management, and endocrine research .

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Q: How should DSIP be stored?

A: Lyophilized DSIP should be stored at -20°C to -80°C for long-term stability . Once reconstituted, store at 2-8°C for up to 28 days, or aliquot and freeze for longer storage .

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Q: Is DSIP FDA-approved?

A: No. DSIP is a research peptide for laboratory use only. It is not FDA-approved for any therapeutic indication .

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Q: What is DSIP-CBBBP mentioned in recent research?

A: DSIP-CBBBP is a fusion peptide combining DSIP with a cell-penetrating peptide (Cross Blood-Brain Barrier Peptide) to enhance delivery across the BBB. Recent 2024 research shows it has better restorative effects than DSIP alone on neurotransmitter imbalance .

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DSIP VS. OTHER SLEEP-RELATED PEPTIDES

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WHAT RESEARCHERS SAY

Dr. Alan Richards – Richards Research Institute, Boston

“Our lab studies sleep architecture in neurological disease models. DSIP’s unique ability to modulate multiple neurotransmitter systems while crossing the BBB makes it an invaluable tool. Pinecrest’s product has been consistently pure with excellent documentation across multiple orders.”

Kevin O’Brien – O’Brien Distributing, Chicago

*”DSIP has seen renewed research interest following the 2024 Frontiers study on BBB-penetrating fusion peptides. Researchers appreciate its well-characterized mechanisms and the growing body of evidence in stress and neuroprotection research. Pinecrest’s quality means I can supply it with confidence.”*

Dr. Susan Walters – Walters Clinical Research, Cleveland

“The distinction between DSIP and traditional sedatives is critical for our research into non-pharmacological sleep interventions. Having access to well-documented, high-purity peptide with third-party testing is essential for reproducible results.”

 READY TO ORDER DSIP FOR SALE ONLINE?

Questions about DSIP for your research? Email us.

sales@pinecrestpeptides.com
Response time: Within 4 hours

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ORDER DSIP FOR SALE ONLINE TODAY

The original sleep-regulating neuropeptide. 99% pure. Manufacturer-direct. Ready to ship to USA labs.