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. Of the 450 active UK sellers we audit, 38 (8%) publish their own verifiable Janoshik certificate of analysis, and this page lists which of them hold one covering DSIP, newest certificate first. It is a record of paperwork, not a recommendation: The Peptide Watch sells nothing, takes no money from sellers and links to none of them. 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. Purity and identity cannot be judged by eye, so an independent certificate you can check is the only real proof of what is in the vial.
The one test that matters for DSIP
Ignore the marketing. The question is simple: does the seller publish a verifiable Janoshik certificate that names the seller itself as the client? If it does, you can confirm an independent lab tested that batch. If it shows an in-house document, a borrowed certificate, or "COA on request", you cannot. Learn the two-minute check in how to verify a Janoshik COA.
Which UK sellers publish a verifiable COA
Of the 450 active UK research-peptide sellers we audit, only 38 (8%) publish their own verifiable Janoshik certificate. Any of them is where you can actually verify testing, for DSIP or any compound. A few: Lab77Peptides · Peptology Labs · Biovanta · Camo Chem · Biohackpeptides · Zenic Labs. See the full independently-tested list, or check a specific shop's certificate with the free COA Checker.
Verified UK vendors with a confirmed DSIP Janoshik certificate (6)
- Lab77Peptides lab77peptides.uk · newest DSIP report 28 Sep 2026 · task #231383
- Peptology Labs peptologylabs.uk · newest DSIP report 18 Sep 2026 · task #233897
- Imperialpeptides imperialpeptides.co.uk · newest DSIP report 28 May 2026 · task #166778
- Thoroughbredlabs thoroughbredlabs.co.uk · newest DSIP report 12 May 2026 · task #155573
- Xlpeptides xlpeptides.com · newest DSIP report 13 Nov 2025 · task #88419
- Kensingtonlabs kensingtonlabs.co.uk · newest DSIP report 7 Oct 2025 · task #81980
Audit findings, not recommendations. Every entry is a report covering DSIP that we opened on Janoshik's own site and that names the seller itself as the client; the date is the analysis date printed on the report where we have read it, otherwise the date the laboratory received the sample. The table below is the same ledger in full, so the two always agree. Not exhaustive: a vendor whose DSIP report we have not yet read is not listed.
The 10 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 | #233898 | Peptology Labs | 21 Sep 2026 | Endotoxin · 1.117 EU/vial | DS4186 | verify |
| Peptology Labs | #233897 | Peptology Labs | 18 Sep 2026 | DSIP · 6.67 mg · 98.994% | DS4186 | verify |
| Peptology Labs | #233899 | Peptology Labs | 18 Sep 2026 | As · not detected Cd · not detected Pb · not detected | DS4186 | verify |
| Imperialpeptides | #166778 | Imperial Peptides UK | www.imperialpeptides.co.uk | 28 May 2026 | DSIP · 11.67 mg · 99.383% | DIP10-05/28 | verify |
| Imperialpeptides | #166779 | Imperial Peptides UK | www.imperialpeptides.co.uk | 28 May 2026 | Endotoxin · 1.311 EU/vial | DIP10-05/28 | verify |
| Imperialpeptides | #166780 | Imperial Peptides UK | www.imperialpeptides.co.uk | 28 May 2026 | As · not detected Cd · not detected Pb · not detected | DIP10-05/28 | verify |
| Thoroughbredlabs | #155573 | Thoroughbred Labs | customerservice@thoroughbredlabs.co.uk | 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 |
What the 10 DSIP certificates show
We have read 10 Janoshik reports covering DSIP, published by 6 UK sellers. Each was opened on Janoshik's own website. All 10 name the seller itself as the client. 8 of the 10 are dated within the last six months. The newest is dated 28 Sep 2026 and the oldest 7 Oct 2025.
6 of the 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. 4 reports test for heavy metals or endotoxins instead. 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.
Questions people ask
Which UK sellers publish a verifiable Janoshik certificate naming DSIP?
As of 4 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.
DSIP in the UK at a glance
| Active UK sellers listing DSIP | 11 |
|---|---|
| Of which publish a verifiable own-name certificate | 6 |
| Of which name no laboratory at all | 3 |
| Paying for Google Ads on it | 2 |
| Sellers of it that have closed or vanished | 0 |
Counted from the vendor ledger at build time: a seller is included when its audit records DSIP in its certificates or its catalogue notes. Audit findings, not recommendations.
The other 5 sellers: what they publish instead
- No named lab, nothing to verify: 3
- Claims manufacturing standard but names no testing lab: 1
- Real lab, but not Janoshik: 1
Each pattern is explained on the seller's own audit page, with what we saw and the date. The A-Z directory lists every seller.
The market for DSIP in the UK
Advertising. Google's Ads Transparency Centre shows 2 of these sellers running ads: Kensingtonlabs, Thoroughbredlabs. Paid reach is where a new buyer meets a brand before meeting any certificate.
Companies. 6 of the 11 can be matched to a Companies House record; the median company is 1.9 years old and 2 were incorporated within the last year. A seller with no traceable company is not necessarily dishonest, but there is nobody to hold to its certificate.
Reviews. 4 of the 11 have a Trustpilot profile with a score; the median is 4.7, 2 sit at 4.5 or above and 0 below 3.0. A review score says who collects reviews, not who tests, which is why it sits next to a certificate and never instead of one.
Changes among DSIP sellers
- 2026-09-27 MrPep (mrpep.co.uk) added to the audit on the watch list.
- 2026-09-27 Lab77Peptides (lab77peptides.uk) published a newer own-name certificate (now Sep 2026).
- 2026-09-21 Muscle Chem (musclechem.com) added to the audit on the watch list.
- 2026-09-15 Xlpeptides (xlpeptides.com) published a newer own-name certificate (now Apr 2026).
- 2026-09-15 Imperialpeptides (imperialpeptides.co.uk) published a newer own-name certificate (now Aug 2026).
- 2026-09-15 Kensingtonlabs (kensingtonlabs.co.uk) published a newer own-name certificate (now May 2026).
From the site changelog, which also runs as a JSON feed.
What the research shows for DSIP, and what it does not
| Papers on PubMed | 462 |
|---|---|
| Indexed as rat or mouse studies | 267 |
| Indexed as clinical trials | 18 |
| Published since 2020 | 9 |
| Trials registered on ClinicalTrials.gov | 1 |
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.
Who owns DSIP, and where it stands
| Originator | Schoenenberger and Monnier, Basel, 1977. |
|---|---|
| Rights | No rights holder or developer. |
| Development status | Development abandoned. Trialled in the 1980s and 1990s, never approved anywhere; pharmaceutical interest ended around 2006. |
| Clinical trials | 1 registered on ClinicalTrials.gov (lead sponsors: Poznan University of Physical Education) |
| In the UK | Not a licensed medicine in the UK. Sold as a research chemical. |
Counts are from PubMed on 15 September 2026 using the queries recorded in our evidence file; "clinical trial" is PubMed's own publication-type index. This is a description of the published record, not medical advice and not an argument for or against use.
Sources (6)
- 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)
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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