Where to buy Sermorelin (GRF 1-29, Geref) in the UK: the sellers with a verifiable COA
The newest verifiable Sermorelin certificate on any UK seller's website is on Peptology Labs (peptologylabs.uk), analysed 18 Sep 2026 (task #233909 on Janoshik's site); 2 verified sellers hold one covering Sermorelin, listed newest first below.
A record of paperwork, not a recommendation: The Peptide Watch sells nothing, takes no money from sellers and links to none of them.
Who has the newest report · Why the date matters · What purity means · What Sermorelin is · Regulators · Every report
Who holds the newest Sermorelin report (2 verified UK sellers)
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.
| Seller | Newest Sermorelin report | Age of that report | Purity on it | |
|---|---|---|---|---|
| Peptology Labs | 18 Sep 2026 | 22 days | 99.421% | verify |
| Ascendpeptidesuk | 7 Apr 2026 | 6 months, 3 days | 99.305% | verify |
Every Sermorelin purity report we have read (2), one row per report
The 2 verifiable Sermorelin 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 | |
|---|---|---|---|---|---|---|
| Peptology Labs | #233909 | Peptology Labs | 18 Sep 2026 | Sermorelin · 5.20 mg · 99.421% | SR5318 | verify |
| Ascendpeptidesuk | #125393 | Ascend Peptides UK | 7 Apr 2026 | Sermorelin · 5.22 mg · 99.305% | 20260114 | 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 Sermorelin is, and what it is sold as
Sermorelin is the first 29 amino acids of human growth hormone-releasing hormone. Serono sold it as the licensed medicine Geref until it was discontinued in 2008, and we found no licensed sermorelin product in the UK today, so what a certificate says about a vial is the only current evidence.
| Development status | Once approved, since discontinued. The FDA approved Geref as a diagnostic in 1990 and as a treatment in 1997. EMD Serono discontinued both in 2008 and the approvals were withdrawn in 2009; the FDA found they were not withdrawn for reasons of safety or effectiveness. |
|---|---|
| Originator | Jean Rivier, Joachim Spiess, Michael Thorner and Wylie Vale reported the 29-amino-acid fragment in Nature in November 1982. Rivier, Spiess and Vale are the inventors on the Salk Institute patents. Rights: Developed and sold by Serono as Geref. Every Geref product is discontinued and the US approvals have been withdrawn. |
| Registered clinical trials | 2 on ClinicalTrials.gov |
A licensed medicine that left the market. Sermorelin is the first 29 amino acids of human growth hormone-releasing hormone, reported in Nature in 1982 by Jean Rivier, Wylie Vale and colleagues at the Salk Institute. Serono sold it as Geref. The FDA approved it as a diagnostic test on 28 December 1990 and as a treatment for children with idiopathic growth hormone deficiency on 26 September 1997.
Discontinued in 2008. EMD Serono told the FDA in 2008 that both products were being discontinued, and the approvals were withdrawn with effect from 18 June 2009. On 4 March 2013 the FDA determined that both "were not withdrawn from sale for reasons of safety or effectiveness". The notices do not give the company's reason. In the UK, the NHS medicines dictionary records one past product, the diagnostic Geref 50, as discontinued.
An old literature. PubMed indexes 369 papers and 63 clinical-trial reports, most from the 1980s and 1990s; 17 papers have been published since 2020. ClinicalTrials.gov lists two studies that name the product, both using it as a test agent. The 2026 WADA Prohibited List names sermorelin among the substances banned in sport at all times.
The published record in numbers, and the sources
| Papers on PubMed | 369 |
|---|---|
| Indexed as rat or mouse studies | 95 |
| Indexed as clinical trials | 63 |
| Published since 2020 | 17 |
Counts are from PubMed on 29 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.
- Characterization of a growth hormone-releasing factor from a human pancreatic islet tumour. (Nature, 1982, PMID 6292724)
- Sermorelin: a review of its use in the diagnosis and treatment of children with idiopathic growth hormone deficiency. (BioDrugs, 1999, PMID 18031173)
- A comparative study of growth hormone (GH) and GH-releasing hormone(1-29)-NH2 for stimulation of growth in children with GH deficiency. (Acta Paediatr Suppl, 1993, PMID 8329830)
- Endocrine and metabolic effects of long-term administration of [Nle27]growth hormone-releasing hormone-(1-29)-NH2 in age-advanced men and women. (J Clin Endocrinol Metab, 1997, PMID 9141536)
- Clinical review: Is lack of recombinant growth hormone (GH)-releasing hormone in the United States a setback or time to consider glucagon testing for adult GH deficiency? (J Clin Endocrinol Metab, 2009, PMID 19509104)
- The emerging landscape of performance-enhancing peptides modulating GH-IGF1 axis: bridging the gap between clinical evidence and patient self-administration. (Front Endocrinol (Lausanne), 2026, PMID 42395176)
- Federal Register, 78 FR 14095, 4 March 2013: FDA determination on Geref
- Federal Register, 74 FR 23407, 19 May 2009: withdrawal of approval of 92 new drug applications, including both for Geref
- NHS dictionary of medicines and devices, Geref 50 (discontinued)
- US patent 4,703,035, Human pancreatic GRF amidated fragments
- WADA, 2026 Prohibited List (S2.2.4: growth hormone releasing factors)
What regulators say about Sermorelin
In the UK. We found no licensed sermorelin medicine in the UK: neither the MHRA products site nor the emc lists one, and the NHS medicines dictionary records the diagnostic Geref 50 as discontinued. Sold as a research chemical. Prohibited in sport.
We hold no statement from the FDA, MHRA or EMA specifically about Sermorelin on file. Its development and licence sources are listed under the record above.
What the 2 Sermorelin certificates show
We have read 2 Janoshik reports covering Sermorelin, published by 2 UK sellers. Each was opened on Janoshik's own website. All 2 name the seller itself as the client. 1 of the 2 is dated within the last six months. The newest is dated 18 Sep 2026 and the oldest 7 Apr 2026.
All 2 reports give a purity figure for Sermorelin. The figures run from 99.305% to 99.421%, and all 2 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: Peptology Labs: task #233909, analysed 18 Sep 2026, 5.20 mg recovered at 99.421%, client Peptology Labs; Ascendpeptidesuk: task #125393, analysed 7 Apr 2026, 5.22 mg recovered at 99.305%, client Ascend Peptides UK.
A certificate is a batch document. The lines that matter are the compound (it must say Sermorelin, 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.
Sermorelin in the UK at a glance
| Active UK sellers listing Sermorelin | 7 |
|---|---|
| Of which publish a verifiable own-name certificate | 2 |
| Of which name no laboratory at all | 2 |
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 Sermorelin?
As of 10 October 2026, 2: Peptology Labs, Ascendpeptidesuk. Each has a report on Janoshik's own website that names the seller as the client and lists Sermorelin. That is a statement about paperwork, not a recommendation; The Peptide Watch does not recommend anywhere to buy Sermorelin.
How recent is the newest Sermorelin certificate from a UK seller?
The newest we have read is Janoshik task #233909, analysed 18 Sep 2026. It is published by Peptology Labs 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 Sermorelin 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 Sermorelin; 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 Sermorelin a licensed medicine in the UK?
We found no licensed sermorelin medicine in the UK: neither the MHRA products site nor the emc lists one, and the NHS medicines dictionary records the diagnostic Geref 50 as discontinued. Sold as a research chemical. Prohibited in sport. The FDA approved Geref as a diagnostic in 1990 and as a treatment in 1997. EMD Serono discontinued both in 2008 and the approvals were withdrawn in 2009; the FDA found they were not withdrawn for reasons of safety or effectiveness. The Peptide Watch does not give legal or medical advice.
Why does The Peptide Watch not say where to buy Sermorelin?
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 Sermorelin. 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 Sermorelin
We found no licensed sermorelin medicine in the UK: neither the MHRA products site nor the emc lists one, and the NHS medicines dictionary records the diagnostic Geref 50 as discontinued. Sold as a research chemical. Prohibited in sport. The Peptide Watch reads the certificates UK sellers publish and does not recommend anywhere to buy Sermorelin. Sellers on this page are listed by the date of their newest Sermorelin 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 Sermorelin and links to no shop; this is research-use-only information, not medical or dosing advice.
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