Where to buy SS-31 (Elamipretide) in the UK: the sellers with a verifiable COA

The newest verifiable SS-31 certificate on any UK seller's website is on Peptology Labs (peptologylabs.uk), analysed 4 Sep 2026 (task #229673 on Janoshik's site); 4 verified sellers hold one covering SS-31, 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 SS-31, 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. SS-31 is a synthetic mitochondria-targeting tetrapeptide studied in cellular-energy research. A newer compound where independent testing is scarcer, so a verifiable certificate carries more weight. 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 SS-31

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 SS-31 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 SS-31 Janoshik certificate (4)

1. Peptology Labs peptologylabs.uk · newest SS-31 report 4 Sep 2026 · task #229673
2. Thoroughbredlabs thoroughbredlabs.co.uk · newest SS-31 report 15 May 2026 · task #149084
3. Xlpeptides xlpeptides.com · newest SS-31 report 16 Mar 2026 · task #121801
4. Imperialpeptides imperialpeptides.co.uk · newest SS-31 report 5 Mar 2026 · task #113077

Audit findings, not recommendations. Every entry is a report covering SS-31 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 SS-31 report we have not yet read is not listed.

The 10 verifiable SS-31 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.

What the 10 SS-31 certificates show

We have read 10 Janoshik reports covering SS-31, published by 4 UK sellers. Each was opened on Janoshik's own website. All 10 name the seller itself as the client. 4 of the 10 are dated within the last six months and 1 is more than a year old. The newest is dated 4 Sep 2026 and the oldest 22 Aug 2025.

6 of the reports give a purity figure for SS-31. The figures run from 99.548% to 99.899%, and all 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: Peptology Labs: task #229673, sample received 4 Sep 2026, 9.76 mg recovered at 99.832%, client PEPTOLOGY LABS LTD; Thoroughbredlabs: task #149084, sample received 15 May 2026, 10.17 mg recovered at 99.684%, client Thoroughbred Labs; Xlpeptides: task #121801, sample received 16 Mar 2026, 10.35 mg recovered at 99.888%, client XL Peptides.

A certificate is a batch document. The lines that matter are the compound (it must say SS-31, 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

SS-31 in the UK at a glance

Counted from the vendor ledger at build time: a seller is included when its audit records SS-31 in its certificates or its catalogue notes. Audit findings, not recommendations.

The other 10 sellers: what they publish instead

• No named lab, nothing to verify: 4
• No testing claim found: 2
• Anonymous / not its own: 1
• Claims testing but names no lab: 1
• Real lab, but not Janoshik: 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 SS-31 in the UK

Advertising. Google's Ads Transparency Centre shows 1 of these sellers running ads: Thoroughbredlabs. Paid reach is where a new buyer meets a brand before meeting any certificate.

Companies. 10 of the 15 can be matched to a Companies House record; the median company is 9 months old and 6 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. 5 of the 15 have a Trustpilot profile with a score; the median is 4.5, 3 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 SS-31 sellers

• 2026-10-02 Renova Peptides (renovapeptides.co.uk) added to the audit on the watch list.
• 2026-10-02 Renovo Peptides (renovopeptides.com) added to the audit on the watch list.
• 2026-09-29 UK Sterling Peptides (uksterlingpeptides.com) left the audit (closed, parked, or out of scope).
• 2026-09-28 PeptX (peptx.co.uk) added to the audit on the watch list.
• 2026-09-27 MrPep (mrpep.co.uk) added to the audit on the watch list.
• 2026-09-27 Peptide Coding UK (peptidecoding.co.uk) added to the audit on the verified list.

From the site changelog, which also runs as a JSON feed.

What the research shows for SS-31, and what it does not

An approved medicine, under another name, for an ultra-rare disease. SS-31 is elamipretide. Stealth BioTherapeutics won FDA accelerated approval on 19 September 2025, as Forzinity, for Barth syndrome in patients weighing at least 30 kg, a condition affecting about 150 people in the United States. PubMed indexes 466 papers and 22 clinical-trial reports; ClinicalTrials.gov lists 29 registered trials, 27 of them Stealth's.

The approval is narrow and provisional. It rests on a 12-patient crossover trial that did not meet its primary endpoints, and accelerated approval requires confirmatory data. Earlier programmes in heart failure and mitochondrial myopathy did not succeed.

None of that applies to a vial sold as SS-31. The licensed product is a prescription medicine for a genetic disease; a research-chemical vial has no dose, indication or safety record, and only a certificate says what is in it.

Who owns SS-31, and where it stands

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.

The Peptide Watch's position on SS-31

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 SS-31. Sellers on this page are listed by the date of their newest SS-31 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.

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