Where to buy DSIP (delta sleep-inducing peptide) in the UK: the sellers with a verifiable COA
The newest verifiable DSIP certificate on any UK seller's website is on Lab77Peptides (lab77peptides.uk), analysed 28 Sep 2026 (task #231383 on Janoshik's site); 6 verified sellers hold one covering DSIP, listed newest first below.
Who holds the newest DSIP report (6 verified UK sellers)
| Seller | Newest DSIP report | Age of that report | |
|---|---|---|---|
| Lab77Peptides lab77peptides.uk | 28 Sep 2026 | 22 days | verify |
| Peptology Labs peptologylabs.uk | 18 Sep 2026 | 1 month, 2 days | verify |
| Imperialpeptides imperialpeptides.co.uk | 28 May 2026 | 4 months, 22 days | verify |
| Thoroughbredlabs thoroughbredlabs.co.uk | 12 May 2026 | 5 months, 8 days | verify |
| Xlpeptides xlpeptides.com | 13 Nov 2025 | 11 months, 7 days | verify |
| Kensingtonlabs kensingtonlabs.co.uk | 7 Oct 2025 | 12 months, 13 days | verify |
Newest report first. Every report was opened on Janoshik's own website and names the seller as the client. The date is the analysis date printed on the report. The verify link opens the laboratory, never the shop. Audit findings, not recommendations.
A record of paperwork, not a recommendation: The Peptide Watch sells nothing, takes no money from sellers and links to none of them.
Why the date matters · What purity means · What DSIP is · Regulators · Every report
Every DSIP purity report we have read (6), one row per report
The 6 verifiable DSIP certificates we have read, newest first
Each row was opened on Janoshik's own site by a real page load and transcribed. The client column is the name the laboratory printed; a certificate counts as a seller's own only when that name is the seller. The report date is the analysis date printed on the report where we have read it, otherwise the date the laboratory received the sample. The verify link opens the laboratory, never the shop. Audit findings, not recommendations.
| Seller | Task | Client on the report | Report date | Result | Batch | |
|---|---|---|---|---|---|---|
| Lab77Peptides | #231383 | Lab77peptides.uk | 28 Sep 2026 | DSIP · 9.99 mg · 99.443% | L77DSIP2612 | verify |
| Peptology Labs | #233897 | Peptology Labs | 18 Sep 2026 | DSIP · 6.67 mg · 98.994% | DS4186 | verify |
| Imperialpeptides | #166778 | Imperial Peptides UK | www.imperialpeptides.co.uk | 28 May 2026 | DSIP · 11.67 mg · 99.383% | DIP10-05/28 | verify |
| Thoroughbredlabs | #155573 | Thoroughbred Labs | [email protected] | 12 May 2026 | DSIP · 12.33 mg · 99.491% | TBLDI921 | verify |
| Xlpeptides | #88419 | XL Peptides | 13 Nov 2025 | DSIP · 8.81 mg · 99.283% | 007DSP01 | verify |
| Kensingtonlabs | #81980 | Kensingtonlabs.co.uk | 7 Oct 2025 | DSIP · 5.41 mg · 99.470% | DSP-184RM | verify |
Why the date on a certificate matters
What a purity figure means
The purity on a Janoshik report is the share of the main peak in an HPLC chromatogram. 99.5% means that 99.5% of what the detector saw was one substance and 0.5% was something else. It is not the amount in the vial: that is the separate quantity line, in milligrams. It does not by itself prove which substance the peak is: that is identity, confirmed by mass spectrometry. And it says nothing about sterility, endotoxins or heavy metals, which are separate tests.
A purity figure printed on a shop page with no report behind it is a claim, not a measurement. Between two reports, the difference that matters is rarely 99.2% against 99.8%; it is whether the report exists at all, names the seller as the client, covers this compound on its own, and is recent.
What DSIP is, and what it is sold as
DSIP is a synthetic nonapeptide studied in sleep and stress research. It is frequently sold with vague testing claims, so a certificate verifiable in the seller's own name is the signal to look for.
| Development status | Development abandoned. Trialled in the 1980s and 1990s, never approved anywhere; pharmaceutical interest ended around 2006. |
|---|---|
| Originator | Schoenenberger and Monnier, Basel, 1977. Rights: No rights holder or developer. |
| Registered clinical trials | 1 on ClinicalTrials.gov |
Fifty years of research that never produced a medicine. Delta sleep-inducing peptide was isolated from rabbit blood in 1977 by Schoenenberger and Monnier in Basel. PubMed indexes 462 papers, 267 in rodents, and 18 clinical-trial reports, almost all from the 1980s and 1990s.
Whether it induces sleep at all is unresolved. A 2006 review in the Journal of Neurochemistry called it 'a still unresolved riddle', and pharmaceutical development stopped around then. ClinicalTrials.gov lists one registered study, an exercise-physiology trial in Poland.
No developer, no licence, no established human dose. The certificate is the only checkable fact about a vial.
The published record in numbers, and the sources
| Papers on PubMed | 462 |
|---|---|
| Indexed as rat or mouse studies | 267 |
| Indexed as clinical trials | 18 |
| Published since 2020 | 9 |
Counts are from PubMed on 15 September 2026 using the queries recorded in our evidence file. A description of the published record, not medical advice and not an argument for or against use.
- An RCT study on the feasibility of anterior transpedicular screw fixation in the cervicothoracic junction. (Eur Spine J, 2016, PMID 26931331)
- [Using deltalicin for the treatment of patients with diabetic retinopathy]. (Eksp Klin Farmakol, 2014, PMID 25739189)
- Delta sleep-inducing peptide alters bispectral index, the electroencephalogram and heart rate variability when used as an adjunct to isoflurane anaesthesia. (Eur J Anaesthesiol, 2009, PMID 19142086)
- Opioid detoxification with delta sleep-inducing peptide: results of an open clinical trial. (J Clin Psychopharmacol, 1998, PMID 9617990)
- Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions. (J Am Acad Orthop Surg Glob Res Rev, 2026, PMID 41490200)
- Kovalzon and Strekalova, 2006, DSIP: a still unresolved riddle (J Neurochem)
What regulators say about DSIP
In the UK. Not a licensed medicine in the UK. Sold as a research chemical.
We hold no statement from the FDA, MHRA or EMA specifically about DSIP on file. Its development and licence sources are listed under the record above.
What the 6 DSIP certificates show
We have read 6 Janoshik reports covering DSIP, published by 6 UK sellers. Each was opened on Janoshik's own website. All 6 name the seller itself as the client. 4 of the 6 are dated within the last six months and 1 is more than a year old. The newest is dated 28 Sep 2026 and the oldest 7 Oct 2025.
All 6 reports give a purity figure for DSIP. The figures run from 98.994% to 99.491%, and 5 of the 6 are at 99% or above. A purity figure describes the sample the laboratory received, not every vial from that batch.
Read directly from the newest reports: Lab77Peptides: task #231383, analysed 28 Sep 2026, 9.99 mg recovered at 99.443%, client Lab77peptides.uk; Peptology Labs: task #233897, analysed 18 Sep 2026, 6.67 mg recovered at 98.994%, client Peptology Labs; Imperialpeptides: task #166778, sample received 28 May 2026, 11.67 mg recovered at 99.383%, client Imperial Peptides UK.
A certificate is a batch document. The lines that matter are the compound (it must say DSIP, not only a batch code), the client (the shop, not its supplier) and the analysis date. A new batch is untested until a new report appears.
DSIP in the UK at a glance
| Active UK sellers listing DSIP | 12 |
|---|---|
| Of which publish a verifiable own-name certificate | 6 |
| Of which name no laboratory at all | 3 |
Counted from the vendor ledger at build time. The A-Z directory lists every seller and what each publishes instead.
Questions people ask
Which UK sellers publish a verifiable Janoshik certificate naming DSIP?
As of 20 October 2026, 6: Lab77Peptides, Peptology Labs, Imperialpeptides, Thoroughbredlabs, Xlpeptides, Kensingtonlabs. Each has a report on Janoshik's own website that names the seller as the client and lists DSIP. That is a statement about paperwork, not a recommendation; The Peptide Watch does not recommend anywhere to buy DSIP.
How recent is the newest DSIP certificate from a UK seller?
The newest we have read is Janoshik task #231383, analysed 28 Sep 2026. It is published by Lab77Peptides and names it as the client. A certificate covers one batch, so an old one says little about stock on sale today.
How do I check that a certificate for DSIP is genuine?
Four things: an independent laboratory is named; the client field names the seller you are buying from, not a supplier; the compound line says DSIP; and the report's task number and key open the same report on the laboratory's own website (verify.janoshik.com). A branded PDF with no laboratory name and no verification code fails on the first check, however professional it looks. The free COA Checker on this site runs the checks for you.
Is DSIP a licensed medicine in the UK?
Not a licensed medicine in the UK. Sold as a research chemical. Trialled in the 1980s and 1990s, never approved anywhere; pharmaceutical interest ended around 2006. The Peptide Watch does not give legal or medical advice.
Why does The Peptide Watch not say where to buy DSIP?
Because the site records paperwork, not recommendations. A verifiable certificate proves that a sample of one batch was tested. It does not prove the vial you receive matches it, and it says nothing about whether anyone should use DSIP. Listing which sellers publish a certificate you can check, and which publish nothing, is as far as the evidence goes.
The Peptide Watch's position on DSIP
Not a licensed medicine in the UK. Sold as a research chemical. The Peptide Watch reads the certificates UK sellers publish and does not recommend anywhere to buy DSIP. Sellers on this page are listed by the date of their newest DSIP certificate and by nothing else. If you can verify a seller's testing, you can at least judge its evidence; if you cannot, you are taking the seller's word for what is in the vial. See how UK testing compares across every seller in the market statistics.
An honest note: a verifiable certificate proves a sample of a batch was tested, not that the specific vial you receive matches it, see what this can and can't tell you. The Peptide Watch sells no DSIP and links to no shop; this is research-use-only information, not medical or dosing advice.
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