Semaglutide in the UK: what you can and cannot verify

Before buying Semaglutide from any UK seller, the one checkable question is whether it publishes an own-name Janoshik certificate of analysis you can verify; 1 verified UK vendors publish a confirmed own-name Janoshik certificate naming Semaglutide that you can check yourself (listed below); every other seller offering it publishes nothing you can verify. Semaglutide is a GLP-1 compound (the active ingredient in Ozempic and Wegovy). It is a licensed prescription medicine, not a research peptide, so it sits in a tighter legal category The Peptide Watch does not list vendors for and does not endorse buying outside a prescription.

Why this matters more, not less, for Semaglutide

Grey-market Semaglutide is among the most faked compounds sold to UK buyers, and a vial that is under-dosed, the wrong compound, or contaminated cannot be judged by sight, price or packaging. The only objective evidence is an independent certificate you can verify. Learn the two-minute check in how to verify a Janoshik COA.

Verified UK vendors with a confirmed Semaglutide Janoshik certificate (1)

1. Kensingtonlabs kensingtonlabs.co.uk · own-name Janoshik COA Jul 2025

Each entry is confirmed directly from that vendor's own-name Janoshik report on the laboratory's own site. This list is not exhaustive: a verified vendor not shown may also test Semaglutide, and compounds are added as each certificate is confirmed.

The Peptide Watch's position on Semaglutide

Semaglutide is a regulated medicine. The Peptide Watch audits research-peptide sellers and does not rank or recommend anywhere to buy Semaglutide; this page exists so the verification standard is clear. If you can verify a seller's testing, you can at least judge its evidence; if you cannot, you are trusting marketing on a regulated medicine sold outside its licensed supply chain. See how UK research-peptide testing stacks up in the market statistics.