Every batch is independently HPLC-tested by Janoshik Analytical, and each certificate names Lab77 as the client, so you can verify it yourself on Janoshik’s own portal. Lab77 holds the most recent own-name Janoshik report of any UK peptide supplier (September 2026), and is one of only 30 UK sellers independently verified by The Peptide Watch.
Who verifies our peptides
Janoshik Analytical is the reference HPLC laboratory most reputable research-peptide suppliers across the UK, EU and US use to verify their batches. They are an independent third-party lab with no ownership, no commercial interest in any peptide manufacturer, and no skin in the game on what the result says.
Their core service is reversed-phase HPLC for purity quantification, with mass-spectrometry confirmation on most batches. Every certificate they issue carries a unique verification key. The same certificate is also added to their public records portal, where anyone can search by compound name, supplier or task ID and see the full historical record of tests they’ve published, with the raw chromatograms attached.
That public record is the bit that matters: every test they’ve ever issued is checkable by anyone, not just the supplier who paid for it. If the result on the COA in your hand doesn’t match the record on the portal, the COA is fake. That single design choice is what makes Janoshik a credible independent verifier and not just another lab.
We send samples from every batch to Janoshik Analytical, an independent third-party lab
Janoshik verifies purity, confirms peptide identity, and quantifies the mass of active compound per vial
Each report includes a unique verification key you can check at janoshik.com/verify
Only batches passing 99%+ purity are approved for sale to our customers
A Janoshik report tests the batch, not the vial size. HPLC measures what the compound is and how pure it is, and that answer is the same whether 10 mg or 90 mg of it goes into the vial; the quantification on the report confirms the amount in the vial that was tested. Every size of a product is filled from the same tested batch, so one report per batch covers every size of it, vial and pen.
Each product page shows the latest report for its batch and says which sizes it covers. The report supplied with your order carries a verification key you can check yourself at janoshik.com.
Click any report to view the full batch details, then verify it directly on Janoshik using the unique key.
Superseded by a newer report of the same product. Kept for reference and still verifiable on Janoshik.
We publish a new Janoshik report with every fresh batch. Leave your email to receive the lab report the day it's issued. No product marketing, no claims - just the raw purity data.
One email per batch. Unsubscribe any time. Your address is only used to send lab reports.
Get in touch and we'll provide any additional documentation you need.