Certificates of Analysis (COA)
Independent lab paperwork for every research-peptide batch we currently hold in UK stock — each one confirming HPLC purity and mass-spectrometry identity, signed off by Janoshik Analytical.
Live batch list — updated 10 July 2026
The reports below belong to the exact lots we are dispatching to UK laboratories right now. Once a batch sells out and fresh stock arrives, that lot is re-tested from scratch and this list is refreshed — so you are only ever looking at documentation for what is genuinely on the shelf, never an archived or superseded result.
Filter by compound, testing lab or analysis date, then hit View COA to open the complete HPLC and mass-spectrometry report. Every one can be checked independently with the lab using the task number and verification key printed on the page. First time reading one? Start with our guide to what a Certificate of Analysis is, or take a look at how each batch moves through testing before release.
| Batch ID | Product | Test Type | Laboratory | Purity | Date | Certificate |
|---|---|---|---|---|---|---|
| EGB-0226-RT10 | Retatrutide 10mg | HPLC | Janoshik | 99.74% | 02 Mar 2026 | |
| EGB-0126-RT20 | Retatrutide 20mg | HPLC | Janoshik | 99.87% | 20 Jan 2026 | |
| EGB-0226-RT20 | Retatrutide 20mg | HPLC | Janoshik | 99.20% | 13 Feb 2026 | |
| EGB-0426-RT30 | Retatrutide 30mg | HPLC | Janoshik | 99.46% | 23 Apr 2026 | |
| EGB-RT30-BBG50 | Retatrutide 30mg | HPLC | Janoshik | 99.74% | 20 Jan 2026 | |
| EGB-0126-RT40 | Retatrutide 40mg | HPLC | Janoshik | 99.89% | 20 Jan 2026 | |
| EGB-0126-TR10 | Tirzepatide 10mg | HPLC | Janoshik | 99.83% | 21 Jan 2026 | |
| EGB-0526-TR30 | Tirzepatide 30mg | HPLC | Janoshik | 99.87% | 23 Apr 2026 | |
| EGB-0126-TR40 | Tirzepatide 40mg | HPLC | Janoshik | 99.77% | 20 Jan 2026 | |
| EGB-0126-TR50 | Tirzepatide 50mg | HPLC | Janoshik | 99.71% | 20 Jan 2026 | |
| EGB-0226-TR50 | Tirzepatide 50mg | HPLC | Janoshik | 99.97% | 02 Mar 2026 | |
| EGB-0126-TR60 | Tirzepatide 60mg | HPLC | Janoshik | 99.84% | 20 Jan 2026 |
Every report is produced by an independent third-party laboratory and can be checked for yourself at janoshik.com/verify using the unique key shown on each certificate.
Follow a lot from the moment it lands to the moment it clears for sale — intake, quarantine, sampling, third-party HPLC and mass-spec analysis, and the pass marks it has to hit first.
GuideA jargon-free walkthrough of a peptide Certificate of Analysis — what each figure on the page actually tells you, and why it should matter to you.