Peptide COA UK
Search peptide Certificates of Analysis by lot number
Unlike suppliers who issue a generic COA on request, SupplyPeptides publishes batch-specific Certificates of Analysis for every lot in UK stock — HPLC purity, mass-spec identity, and test date, verified by Janoshik Analytical. Search by lot number before you order.
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is refreshed — so you are only ever looking at documentation for what is genuinely on the shelf, never an archived or superseded result.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. Where a PDF is linked, View COA opens the HPLC and mass-spectrometry report; otherwise you can request the certificate by email. Every report can be checked independently with the lab using the task number and verification key printed on the page. New to COAs? Read how to read a Certificate of Analysis.
| Batch ID | Product | Test Type | Laboratory | Purity | Date | Certificate |
|---|---|---|---|---|---|---|
| SP-0426-RT30 | Retatrutide 30mg | HPLC | Janoshik | 99.46% | 23 Apr 2026 | |
| SP-0526-TR30 | Tirzepatide 30mg | HPLC | Janoshik | 99.87% | 23 Apr 2026 | |
| SP-0426-CG05 | Cagrilintide 5mg | HPLC | Janoshik | 99.68% | 08 Apr 2026 | |
| SP-0326-SM10 | Semaglutide 10mg | HPLC | Janoshik | 99.81% | 12 Mar 2026 | |
| SP-0226-RT10 | Retatrutide 10mg | HPLC | Janoshik | 99.74% | 02 Mar 2026 | |
| SP-0226-TR50 | Tirzepatide 50mg | HPLC | Janoshik | 99.97% | 02 Mar 2026 | |
| SP-0226-RT20 | Retatrutide 20mg | HPLC | Janoshik | 99.20% | 13 Feb 2026 | |
| SP-0126-TR10 | Tirzepatide 10mg | HPLC | Janoshik | 99.83% | 21 Jan 2026 | |
| SP-0126-RT20 | Retatrutide 20mg | HPLC | Janoshik | 99.87% | 20 Jan 2026 | |
| SP-0126-RT40 | Retatrutide 40mg | HPLC | Janoshik | 99.89% | 20 Jan 2026 | |
| SP-0126-TR40 | Tirzepatide 40mg | HPLC | Janoshik | 99.77% | 20 Jan 2026 | |
| SP-0126-TR50 | Tirzepatide 50mg | HPLC | Janoshik | 99.71% | 20 Jan 2026 | |
| SP-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.
Guides
Guide
How to read a COA →
A 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.
Education
HPLC purity & terminology →
What HPLC purity, identity (MS), and related research terms mean — without turning jargon into human-use claims.
Quality
HPLC-tested peptides UK →
How SupplyPeptides verifies every batch with HPLC, mass-spec and physical QC — and what to look for when other suppliers say “lab tested” without publishing data.
Research Hub
Explore compound research →
Mechanisms, literature context, and laboratory notes across our Research Hub — written for qualified researchers.
Checklist
How to verify a batch COA (interactive checklist)
Use this before you run critical experiments. Tick each item against the PDF and the vial in front of you.
Full walkthrough: How to read a Certificate of Analysis →
Account
Create an account for faster reordering
Save addresses, track orders, and reorder research materials without re-entering details — free to join.