Where to buy Tesamorelin in the UK: the sellers with a verifiable COA
The newest verifiable Tesamorelin certificate on any UK seller's website is on Lab77Peptides (lab77peptides.uk), analysed 29 Sep 2026 (task #231376 on Janoshik's site); 11 verified sellers hold one covering Tesamorelin, 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 Tesamorelin, 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. Tesamorelin is a synthetic analogue of growth-hormone-releasing hormone (GHRH) studied in metabolic research. Because the cheaper, shorter GHRH-family peptides sermorelin and CJC-1295 are common relabelling targets, an identity test (mass spectrometry) confirming the actual compound matters as much as the purity figure. 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 Tesamorelin
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 Tesamorelin 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 Tesamorelin Janoshik certificate (11)
- Lab77Peptides lab77peptides.uk · newest Tesamorelin report 29 Sep 2026 · task #231376
- Peptology Labs peptologylabs.uk · newest Tesamorelin report 10 Sep 2026 · task #230188
- BioVanta Research biovantaresearch.com · newest Tesamorelin report 25 May 2026 · task #153912
- Phoenixbiolabs phoenixbiolabs.net · newest Tesamorelin report 19 May 2026 · task #147254
- Thoroughbredlabs thoroughbredlabs.co.uk · newest Tesamorelin report 15 May 2026 · task #149078
- Peptifyuk peptifyuk.com · newest Tesamorelin report 11 May 2026 · task #149062
- Ascendpeptidesuk ascendpeptidesuk.com · newest Tesamorelin report 31 Mar 2026 · task #125394
- Regenix Peptides regenix-peptides.co.uk · newest Tesamorelin report 17 Feb 2026 · task #103613
- Clinicore clinicore.co.uk · newest Tesamorelin report 19 Jan 2026 · task #100573
- Imperialpeptides imperialpeptides.co.uk · newest Tesamorelin report 15 Jan 2026 · task #99744
- Xlpeptides xlpeptides.com · newest Tesamorelin report 28 Jan 2025 · task #56758
Audit findings, not recommendations. Every entry is a report covering Tesamorelin 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 Tesamorelin report we have not yet read is not listed.
The 16 verifiable Tesamorelin 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 | #231376 | Lab77peptides.uk | 29 Sep 2026 | Tesamorelin · 10.36 mg · 98.241% | L77tsm2612 | verify |
| Peptology Labs | #230188 | Peptology Labs | 10 Sep 2026 | Tesamorelin · 10.89 mg · 98.429% | TS4185 | verify |
| Peptology Labs | #230113 | PEPTOLOGY LABS LTD | 9 Sep 2026 | Endotoxin · <1 EU/vial | TS4185 | verify |
| Peptology Labs | #230114 | PEPTOLOGY LABS LTD | 9 Sep 2026 | As · not detected Cd · not detected Pb · not detected | TS4185 | verify |
| Lab77Peptides | #193652 | Lab77Peptides.co.uk | 19 Jun 2026 | Tesamorelin · 10.86 mg · 97.419% | 77TSM265 | verify |
| BioVanta Research | #153912 | Biovanta Research | 25 May 2026 | Tesamorelin · 5.12 mg · 96.078% | TSM-123QW | verify |
| Phoenixbiolabs | #147254 | www.phoenixbiolabs.net | 19 May 2026 | Tesamorelin · 4.96 mg · 98.110% | Batch-0143 used in vials + pen(s) | verify |
| Thoroughbredlabs | #149078 | Thoroughbred Labs | customerservice@thoroughbredlabs.co.uk | 15 May 2026 | Tesamorelin · 5.22 mg · 98.040% | TBLTE598 | verify |
| Peptifyuk | #149062 | Peptify UK | 11 May 2026 | Tesamorelin · 10.78 mg · 99.093% | 2026/04 | verify |
| Ascendpeptidesuk | #125394 | Ascend Peptides UK | 31 Mar 2026 | Tesamorelin · 10.74 mg · 99.501% | 20260114 | verify |
| Regenix Peptides | #103613 | https://regenix-peptides.co.uk | 17 Feb 2026 | Tesamorelin · 10.39 mg · 99.642% | TESA101 | verify |
| Clinicore | #100573 | clinicore | 19 Jan 2026 | Tesamorelin · 11.41 mg · 99.704% | te10101 | verify |
| Imperialpeptides | #99744 | Imperial Peptides UK | www.imperialpeptides.co.uk | 15 Jan 2026 | Tesamorelin · 8.03 mg · 99.559% | TES5-01/28 | verify |
| Imperialpeptides | #99745 | Imperial Peptides UK | www.imperialpeptides.co.uk | 15 Jan 2026 | As · not detected Cd · not detected Pb · not detected | TES5-01/28 | verify |
| Imperialpeptides | #99746 | Imperial Peptides UK | www.imperialpeptides.co.uk | 15 Jan 2026 | Endotoxin · 7.061 EU/vial | TES5-01/28 | verify |
| Xlpeptides | #56758 | XL Peptides | 28 Jan 2025 | Tesamorelin · 6.27 mg · 99.276% | 007001 | verify |
What the 16 Tesamorelin certificates show
We have read 16 Janoshik reports covering Tesamorelin, published by 11 UK sellers. Each was opened on Janoshik's own website. All 16 name the seller itself as the client. 9 of the 16 are dated within the last six months and 1 is more than a year old. The newest is dated 29 Sep 2026 and the oldest 28 Jan 2025.
12 of the reports give a purity figure for Tesamorelin. The figures run from 96.078% to 99.704%, and 6 of the 12 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 #231376, analysed 29 Sep 2026, 10.36 mg recovered at 98.241%, client Lab77peptides.uk; Peptology Labs: task #230188, analysed 10 Sep 2026, 10.89 mg recovered at 98.429%, client Peptology Labs; BioVanta Research: task #153912, analysed 25 May 2026, 5.12 mg recovered at 96.078%, client Biovanta Research.
A certificate is a batch document. The lines that matter are the compound (it must say Tesamorelin, 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 Tesamorelin?
As of 4 October 2026, 11: Lab77Peptides, Peptology Labs, BioVanta Research, Phoenixbiolabs, Thoroughbredlabs, Peptifyuk, Ascendpeptidesuk, Regenix Peptides, Clinicore, Imperialpeptides, Xlpeptides. Each has a report on Janoshik's own website that names the seller as the client and lists Tesamorelin. That is a statement about paperwork, not a recommendation; The Peptide Watch does not recommend anywhere to buy Tesamorelin.
How recent is the newest Tesamorelin certificate from a UK seller?
The newest we have read is Janoshik task #231376, analysed 29 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 Tesamorelin 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 Tesamorelin; 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 Tesamorelin a licensed medicine in the UK?
Not licensed in the UK or EU. Sold as a research chemical. FDA-approved for HIV-associated lipodystrophy since 2010; the European application was withdrawn in 2012. The Peptide Watch does not give legal or medical advice.
Why does The Peptide Watch not say where to buy Tesamorelin?
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 Tesamorelin. Listing which sellers publish a certificate you can check, and which publish nothing, is as far as the evidence goes.
Tesamorelin in the UK at a glance
| Active UK sellers listing Tesamorelin | 36 |
|---|---|
| Of which publish a verifiable own-name certificate | 13 |
| Of which name no laboratory at all | 11 |
| Paying for Google Ads on it | 3 |
| Sellers of it that have closed or vanished | 1 |
Counted from the vendor ledger at build time: a seller is included when its audit records Tesamorelin in its certificates or its catalogue notes. Audit findings, not recommendations.
The other 23 sellers: what they publish instead
- No named lab, nothing to verify: 11
- Shows a supplier's certificate, not its own: 2
- No testing claim found: 2
- Anonymous / not its own: 1
- Reseller showing the maker's certificate: 1
- Testing claimed, not yet evidenced: 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 Tesamorelin in the UK
Advertising. Google's Ads Transparency Centre shows 3 of these sellers running ads: Peptifyuk, Regenix Peptides, Thoroughbredlabs. Paid reach is where a new buyer meets a brand before meeting any certificate.
Companies. 16 of the 36 can be matched to a Companies House record; the median company is 10 months old and 9 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. 10 of the 36 have a Trustpilot profile with a score; the median is 4.5, 5 sit at 4.5 or above and 1 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 Tesamorelin sellers
- 2026-10-02 Northwest Peptides (nwpeptides.co.uk) added to the audit on the watch list.
- 2026-09-29 Evolve Peptides UK (evolvepeptides.uk) added to the audit on the watch list.
- 2026-09-29 Biochem Peptides (biochem-peptides.co.uk) added to the audit on the watch list.
- 2026-09-29 Quantum Peptides (quantumpeptides.uk) added to the audit on the watch list.
- 2026-09-28 Clinicore (clinicore.co.uk) added to the audit on the verified list.
- 2026-09-27 Lab77Peptides (lab77peptides.uk) published a newer own-name certificate (now Sep 2026).
From the site changelog, which also runs as a JSON feed.
Shops named after Tesamorelin
Tesamorelin (Premium Research Peptides) (watch), Tesamorelin Lab (watch). A compound in the domain name is a marketing choice, not evidence; each is audited like any other seller.
What the research shows for Tesamorelin, and what it does not
| Papers on PubMed | 104 |
|---|---|
| Indexed as rat or mouse studies | 3 |
| Indexed as clinical trials | 24 |
| Published since 2020 | 36 |
| Trials registered on ClinicalTrials.gov | 24 |
An approved medicine in the United States, for one narrow use. Tesamorelin is Theratechnologies' Egrifta, approved by the FDA in November 2010 to reduce excess abdominal fat in adults with HIV-associated lipodystrophy, with a weekly formulation approved in 2025. PubMed indexes 104 papers, 24 of them clinical-trial reports; ClinicalTrials.gov lists 24 registered trials.
Not in Europe. Theratechnologies withdrew its European application on 22 June 2012, citing the lack of long-term safety data on raised IGF-1 and the absence of a cardiovascular endpoint. It has never been licensed in the UK or EU.
The evidence is for the licensed product in that population. Nothing in the trial record supports use in healthy adults, and none of it says what is in a research-chemical vial; only a verifiable certificate does that.
Who owns Tesamorelin, and where it stands
| Originator | Theratechnologies (TH9507). |
|---|---|
| Rights | Theratechnologies; marketed as Egrifta and Egrifta WR. |
| Development status | Approved in the US only. FDA-approved for HIV-associated lipodystrophy since 2010; the European application was withdrawn in 2012. |
| Clinical trials | 24 registered on ClinicalTrials.gov (lead sponsors: Massachusetts General Hospital, Theratechnologies, Johns Hopkins University) |
| In the UK | Not licensed in the UK or EU. 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 (10)
- Effects of Tesamorelin on Neurocognitive Impairment in Persons With HIV and Abdominal Obesity. (J Infect Dis, 2025, PMID 39813152)
- Efficacy and safety of tesamorelin in people with HIV on integrase inhibitors. (AIDS, 2024, PMID 38905488)
- Growth Hormone Releasing Hormone Reduces Circulating Markers of Immune Activation in Parallel with Effects on Hepatic Immune Pathways in Individuals with HIV-infection and Nonalcoholic Fatty Liver Disease. (Clin Infect Dis, 2021, PMID 33852720)
- Clinical Predictors of Liver Fibrosis Presence and Progression in Human Immunodeficiency Virus-Associated Nonalcoholic Fatty Liver Disease. (Clin Infect Dis, 2021, PMID 32270862)
- Injectable Peptide Therapy: A Primer for Orthopaedic and Sports Medicine Physicians. (Am J Sports Med, 2026, PMID 41476424)
- Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions. (J Am Acad Orthop Surg Glob Res Rev, 2026, PMID 41490200)
- Safety and Efficacy of Approved and Unapproved Peptide Therapies for Musculoskeletal Injuries and Athletic Performance. (Sports Med, 2026, PMID 41966639)
- HIV i-Base, FDA approves tesamorelin (2010)
- HIV i-Base, Theratechnologies withdraws EU application (2012)
- Drugs.com, Egrifta WR approval history
The Peptide Watch's position on Tesamorelin
Not licensed in the UK or EU. Sold as a research chemical. The Peptide Watch reads the certificates UK sellers publish and does not recommend anywhere to buy Tesamorelin. Sellers on this page are listed by the date of their newest Tesamorelin 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 Tesamorelin and links to no shop; this is research-use-only information, not medical or dosing advice.
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