How many vials are in a DSIP kit?

Every kit is 10 vials. The "5mg" label means 5 mg per vial, so a 5 mg kit gives 50 mg total, a 10 mg kit gives 100 mg total, and so on.

Is the price per vial or per kit?

Prices shown are for the full 10-vial kit. We always show the per-vial and per-mg breakdown so you can compare honestly.

What payment methods do you accept?

SEPA bank transfer (IBAN) is our default — secure, fee-free, instant confirmation. We can also send a secure card-payment link on request via WhatsApp.

Do you ship outside the EU?

Yes — UK, USA, Middle East, Asia and Australia. EU is fastest (5–18 business days). International is tracked and discreet. Some destinations are restricted — checkout will tell you.

How is purity verified?

Every batch is independently tested by HPLC and mass spectrometry. We can send the batch-specific COA for your order on request.

Is this intended for human use?

No. DSIP sold by Regena Peptides is a research compound supplied strictly for in-vitro laboratory investigation by qualified professionals. Not for human or veterinary use.

A nine-amino-acid neuropeptide first isolated in 1977 and studied as a reference compound in sleep, stress-axis and neuroendocrine research.

Has a DSIP receptor been identified?

No. Its receptor and gene remain unidentified, which is a key open question in the literature.

Where can I buy DSIP for research?

Regena supplies DSIP as a 10-vial lyophilised research kit, shipped worldwide from our Germany, USA and China hubs with tracked delivery in 5–18 business days from tracking.

What purity is Regena DSIP?

≥99% by HPLC with mass-spectrometry identity confirmation. Batch-specific COAs are available on request.

How should lyophilised DSIP be stored?

Sealed lyophilised powder is typically stored frozen at −20 °C, protected from light and moisture. Follow your laboratory's validated handling procedures after reconstitution.

Is DSIP approved as a medicine?

No. DSIP is not an approved medicine and is supplied strictly for in-vitro research.

Available documentation

Tracked worldwide shipping

Secure bank transfer

Research use only

Cognitive · Research kit

DSIPlaboratory reference kit

aka Delta Sleep-Inducing Peptide

Kit of 10 vials

Nonapeptide studied in sleep, stress and circadian research models.

Class: Nonapeptide
Half-life: ~7 min (systemic)
Kit: 10 vials
Use: Research only

Kit of 10 vials · 10mg per vial

Best value

€289.00

€28.90 per vial · €2.89/mg

Sold as 10-vial kits · minimum order

We don't sell single vials. Every order is a sealed 10-vial research kit with the size and full kit price shown before ordering.

✓ Batch documentation — ask for documentation matching the batch available to order.
✓ Clear format — the selected vial size, vial count and total kit price stay visible before adding to cart.

Choose your kit size

1 kit = 10 vials. Compare the full kit prices below.

Quantity

Every DSIP option — one tap to send us the list5mg kit (10 vials) — €249.0010mg kit (10 vials) — €289.00Tap to open WhatsApp with every option already typed — we'll tell you which kit fits your research, and suggest anything else worth looking at.

✓ Sealed 10-vial kit (small glass bottles, lyophilised powder)
✓ Ask for the Certificate of Analysis available for this batch
✓ Tracked worldwide shipping from Germany, the USA or China · allow 5–18 business days from tracking
! You'll also need bacteriostatic water to mix your peptides

DocumentationAsk before ordering
Tracked delivery5–18 business days
Research use onlySee policy

Secure checkout · Wise card and bank-transfer options · Germany, USA or China fulfilment

Estimated delivery

Choose your country to see a delivery estimate.

Questions about DSIP? Message us about available sizes and documentation.

Payment options at checkout. Choose Wise or Monzo card payment, or pay by SEPA / international bank transfer.

Tracked worldwide shipping. Discreet packaging from Germany, the USA or China; allow 5–18 business days after tracking is issued. Shipping details.

Independent HPLC + MS test: 99.77%. View batch LOT#2708 COA · how to read it.

Read our purity policy or contact us before ordering.

View full DSIP buyer page →

€ Price per mg — honest breakdown

Every DSIP kit ships as 10 vials. Here's the exact maths so you can see which strength gives you the most peptide per euro. Larger kits are usually significantly cheaper per mg.

Kit price

€289.00

10 mg × 10 vials

Per vial

€28.90

€289.00 ÷ 10 vials

Total mg in kit

100 mg

10 mg × 10

Per mg

€2.89

€289.00 ÷ 100 mg

Compare every kit

Kit	Kit price	Per vial	Per mg
5 mg / vial	€249.00	€24.90	€4.98
10 mg / vialBest €/mg	€289.00	€28.90	€2.89

What is DSIP?

DSIP is a naturally occurring nonapeptide originally isolated from rabbit cerebral venous blood. Research focuses on delta-wave EEG modulation, stress-axis effects and circadian biology.

Mechanism of action

Modulates EEG delta-wave activity and stress-response peptide release.

Primary research areas

Sleep architecture, stress and circadian research models.

Research notes

Very short systemic half-life — typically delivered as a research tool compound.

DSIP: expanded research context

DSIP (Delta Sleep-Inducing Peptide) is a nine-residue neuropeptide (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) first isolated in 1977 by the Monnier and Schoenenberger group from the cerebral venous blood of rabbits during electrically induced slow-wave sleep. Despite five decades of study, no dedicated DSIP receptor or gene has been identified, which is why it remains one of the more debated peptides in neuroendocrine research.

Laboratory interest centres on its reported interactions with sleep architecture, stress-axis signalling (ACTH and corticotropin release), luteinising hormone modulation and oxidative-stress markers in animal models. DSIP crosses the blood–brain barrier in some experimental preparations, a property that makes it a reference compound for peptide-transport studies.

Regena supplies DSIP as a lyophilised research reagent, HPLC-tested to ≥99% purity with mass-spectrometry identity confirmation. It is intended for in-vitro and laboratory reference use only and is not for human consumption.

Published clinical evidence

Selected peer-reviewed studies and outcome trials referenced in the DSIP literature. Sources listed for orientation; full papers via PubMed / journal DOI.

Isolation of a delta-sleep-inducing factor
Pflügers Archiv · 1977
Original isolation of the nonapeptide from rabbit cerebral venous blood collected during induced slow-wave sleep, establishing the DSIP sequence.
DSIP: a still unresolved riddle
Journal of Neurochemistry · 2006
Review concluding that DSIP's physiological role and receptor remain unidentified despite extensive literature on sleep, stress and endocrine effects.
DSIP and the hypothalamic–pituitary axis
Peptides (journal) · 1980s review literature
Animal work describing DSIP modulation of ACTH, LH and somatostatin release, supporting its use as a neuroendocrine reference peptide.
Antioxidant activity of DSIP in rodent stress models
Neurochemical Research · 2000s
Studies reporting changes in lipid peroxidation and antioxidant-enzyme markers in stressed animals exposed to DSIP.

Verified test batches — download COAs

Independent third-party Certificates of Analysis for recent DSIP batches. Click any COA to open or download the full lab report — verify each result at www.janoshik.com/verify.

BatchLabPurityCOA

LOT#2708 · #80236

HPLC + MS · 2025-09-23

Janoshik Analytical99.8%Download →

Verify any COA at www.janoshik.com/verify using the unique key printed on the report. What is Janoshik?

Why researchers buy from Regena

HPLC ≥99% purity

Every batch independently tested. Mass spectrometry verification on every research compound. COAs on request.

10-vial kits, properly sealed

Lyophilized peptide, rubber-stoppered amber vials, batch-coded. Stable for shipping; cold storage on arrival.

Germany · USA · China hubs

Tracked delivery from the best hub for your destination and available stock. Discreet, plain packaging.

Secure SEPA bank transfer

Encrypted checkout, verified IBAN. No card details stored. Card payment links available on request.

How ordering works

1
Pick your DSIP kit above
Each kit contains 10 vials. Choose your strength — bigger vials give you a lower €/mg.
2
Secure checkout in under 2 minutes
Add to cart, fill in shipping, get your IBAN and order reference instantly.
3
Pay by bank transfer (or card on request)
Bank transfer is fastest and fee-free. Need a card? Message us on WhatsApp and we'll send a payment link.
4
We ship within 24 hours
You get a tracking number by email + WhatsApp. EU delivery 5–18 business days. COA included on request.

Frequently asked questions

Research-use disclaimer

Information on this page is provided for educational and scientific reference purposes only. DSIP is a research compound intended for in-vitro laboratory investigation by qualified professionals. Nothing here constitutes medical advice, dosing guidance or a recommendation for human or veterinary use. Half-life and mechanism descriptions reflect published literature approximations.

Need protocol guidance?

Book a free 20-minute consultation — we'll map DSIP and adjacent reference compounds to your research goals.

Book consultation →

Add a solvent

Bacteriostatic Water
Kit of 10 × 10 ml vials · Standard solvent for most peptides
€149.00
Acetic Acid Kit
Kit of 10 × 3 ml vials (liquid) · For peptides that stay cloudy in BAC water
€149.00

Worldwide delivery from Fuengirola

Regena Peptides is based in Fuengirola, Spain and ships HPLC-verified research compounds worldwide — Europe, the UK and the USA — from our Germany, USA and China hubs, 5–18 business days from tracking.

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Available strengths: 5mg · 10mg

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Free download · PDF

Free: Peptide Storage & Reconstitution Guide

30-page PDF — vial handling, sterile reconstitution, dosing math, cold-chain storage. Plus a daily research insight email from the lab.

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Keep reading

DSIP — shipped to research hubs worldwide

Same HPLC-verified DSIP batch, same COA — tracked delivery to laboratories and independent researchers across Europe, the UK, the USA and beyond. Pick a hub for local shipping window and currency notes.

View every research hub we ship to →Browse the full peptide library Site index

Customer reviews

What researchers say about DSIP

Share your experience

Your review helps other researchers evaluate DSIP. We publish every real review — positive or critical — after a quick moderation pass to filter spam and PII.

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Cite this reference

Researching DSIP?

Copy a ready-made citation or HTML link. Backlinks from research blogs, lab wikis and biohacker communities help others find verified peptide sources.

Regena Peptides. (2026-10-22). DSIP — HPLC-verified research peptide. https://regena.app/peptides/dsip

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