All products are for laboratory research purposes only. Not for human consumption.
Quality Assurance & Certificates of Analysis
Every product ships with a batch-specific COA from Janoshik or Freedom Diagnostic. We do not sell a single peptide without independent analytical verification.
Our Process
How We Verify Quality
Manufacturer Testing
Manufacturers submit each batch for independent analysis at Janoshik Analytical or Freedom Diagnostic laboratories.
Team Review
Our team personally reviews every COA, verifies the results, and tests the product before it is listed for sale.
Shipped with COA
Every box includes the batch-specific COA documenting peptide identity and purity via HPLC and Mass Spectrometry.
Testing Partners
Independent Analytical Laboratories
Janoshik Analytical
One of the most respected independent laboratories in peptide and compound analysis. Provides HPLC purity testing and Mass Spectrometry identification.
Freedom Diagnostic
Independent analytical testing laboratory specialising in peptide purity analysis. Provides quantitative purity data via HPLC and compound identification.
Example COA: Retatrutide batch analysis by Janoshik Analytical
Understanding COAs
What a COA Tells You
A Certificate of Analysis is the document that proves a peptide matches its label claim. It is generated by the testing laboratory, not the supplier, and tied to one specific production batch. Every COA from our testing partners includes the following six data points:
HPLC Purity Analysis
High-Performance Liquid Chromatography separates the compound from any impurities and quantifies the percentage purity. The chromatogram shows a clean primary peak with the purity value listed beside it. All our products test at 99%+ purity.
Mass Spectrometry Identification
MS confirms the molecular identity of the peptide by measuring its molecular weight to several decimal places and matching it against the theoretical value for the labelled sequence. This is the proof that the vial contains what the label says it contains.
Batch & Lot Reference
A unique batch or lot number ties the COA to one specific production run. If the number on the document does not match the number printed on the vial label, the COA is not valid for that product, regardless of how impressive the results look.
Test Date
The date the sample was analysed. A current batch should have a recent test date. A COA dated years before the production run is a strong signal that the document has been recycled from an older batch rather than generated for the product in hand.
Compound & Sample Identification
The compound name, expected molecular formula, and theoretical molecular weight are listed at the top of the document. The sample reference number links the analysed sample back to the submission record at the testing laboratory.
Laboratory Letterhead & Signature
A legitimate COA carries the analytical laboratory's letterhead, contact details, and the name or signature of the analyst responsible for the testing. Janoshik and Freedom Diagnostic both follow this convention on every report they issue.
Learn to Read Every COA Like the Lab That Wrote It
This page covers the fundamentals. Our Peptide Sourcing & Verification Guide goes the rest of the way. Two chapters are dedicated specifically to COA analysis and the documentation tricks unreliable suppliers use to mask quality problems.
How to interpret an HPLC chromatogram
Reading peaks, retention times, and what a clean run actually looks like versus a contaminated one.
14 documented red flags in fake COAs
Recycled documents, edited PDFs, mismatched analyst signatures, and the wording patterns that give a fabricated report away.
How to cross-check a COA with the testing laboratory
The exact email template to send Janoshik or Freedom Diagnostic to confirm a report is authentic, and what their response will look like.
A verified supplier directory
Direct contacts for suppliers that have passed full COA verification, plus pricing and response time notes.
Two chapters on COA mastery
Reading a COA Like an Analyst
HPLC and Mass Spectrometry results explained line by line. What 98% purity actually means versus 99%. How to cross-check a COA against independent testing databases.
Red Flags and Scam Patterns
14 specific warning signs documented from real failed supplier evaluations. Recycled COAs, edited test dates, mismatched batch numbers, suspiciously perfect results.
A single mistake on a 10-vial box can cost £150-300+. The guide is £29.99, instant PDF download, yours to keep.
Request COA Documentation
Want to see a COA for a specific peptide before ordering? Message us on WhatsApp.