Description
DSIP, short for Delta Sleep-Inducing Peptide, is a nine-amino-acid neuropeptide that has been studied in sleep research for nearly fifty years. Limitless Life Nootropics supplies it in Premium lyophilized grade, made in the USA.
What Is DSIP?
Swiss researchers led by Marcel Monnier isolated the peptide in 1977 from the blood of rabbits whose thalamus had been electrically stimulated to induce sleep. When the fraction was transferred to other rabbits, it increased delta (slow-wave) brain activity, which gave the peptide its name. Its sequence is Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu.
Later research found that its effects extend beyond sleep. Studies have examined its influence on stress hormones, body temperature, pain perception, luteinizing hormone release and antioxidant defenses. The precise receptor through which it acts has not been definitively identified, which keeps it an active subject of investigation.
This Premium lyophilized product may contain trehalose as a lyoprotectant. A ready-to-use spray is also available.
Key Research Areas
The scientific literature describes this peptide across several areas of investigation:
- Slow-wave (delta) sleep architecture
- Circadian rhythm regulation
- Stress hormone and ACTH modulation
- Pain perception models
- Antioxidant and mitochondrial effects
Researchers can review peer-reviewed studies on delta sleep-inducing peptide through the National Library of Medicine (PubMed) database.
DSIP Specifications
| Product | DSIP Delta Sleep-Inducing Peptide |
|---|---|
| Compound type | Nonapeptide (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) |
| Format | Lyophilized (freeze-dried) powder in a sealed glass vial |
| Purity | ≥99% (HPLC verified) |
| Origin | Manufactured in the USA |
| Testing | Independent third-party lab |
| Intended use | Laboratory research only |
The Limitless Life Nootropics Standard
Limitless Life Nootropics was built around a simple idea: research results are only as reliable as the materials behind them. We focus on a carefully curated catalog of peptides and research compounds, keep inventory fresh, and publish clear specifications for every product. Our team answers technical questions quickly, and transparent pricing means no hidden fees or minimum orders for smaller labs.
Quality and Third-Party Testing
Consistency matters in research. That is why Limitless Life Nootropics only releases this peptide after independent third-party testing confirms purity and identity. Production takes place in the USA under strict quality controls, and lot-specific documentation supports reproducible results.
Storage and Handling
For maximum shelf life, keep this peptide in its original sealed vial in a freezer (-20°C). Reconstituted material should be refrigerated, handled with sterile technique, and never left at room temperature for extended periods.
Need supplies? Pair your order with our reconstitution solution and sterile 10 mL vials for convenient preparation.
Ordering and Shipping
We know research timelines are tight. Most orders ship within one to two business days from our U.S. facility, packed discreetly and tracked from dispatch to delivery. Checkout is encrypted, and our support team can help with documentation, order status or bulk quantities for ongoing projects.
Related Research Products
Teams working with this peptide often explore DSIP Spray, Orexin A Spray and 9-Me-BC Powder. Browse the full Circadian Research and Cognitive Research collections, or view every compound in our research peptide catalog at Limitless Life Nootropics.
Frequently Asked Questions
When was this peptide discovered?
It was isolated in 1977 by Marcel Monnier’s group from the blood of sleeping rabbits.
Is a spray version available?
Yes, it is also offered as a ready-to-use spray.
Is DSIP for human use?
No. It is sold strictly for laboratory research. It is not intended for human or animal consumption, diagnosis or treatment.
Where can I buy DSIP online?
You can order it directly from Limitless Life Nootropics, a U.S. supplier of third-party tested research peptides with fast, discreet shipping.
Research Use Only
All products sold by Limitless Life Nootropics are intended strictly for in-vitro laboratory research and scientific study. This product is not a drug, food, supplement or cosmetic, has not been evaluated by the FDA, and is not for human or veterinary use. Purchase is limited to qualified researchers aged 21 and over.
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