Analysis & Traceability

Lab testing & certificates of analysis

Independent, batch-level analysis by Janoshik Analytical on every compound we supply. Identity confirmed by mass spectrometry, purity quantified by HPLC, published to the certificate for the exact lot you receive.

Independent Laboratory

Tested by Janoshik.

We don't grade our own work. Every production lot is analysed by Janoshik Analytical, a leading independent laboratory trusted across the research-peptide field. The certificate you receive is issued directly from their analysis, not ours.

HPLC purity, quantifiedJanoshik measures the exact purity of every lot by HPLC.

Mass-spec identityMolecular weight confirmed against the target peptide sequence.

Independent & unaffiliatedThird-party results we cannot edit. Verify any lot yourself.

About Janoshik testing

Janoshik ReportVerified

LaboratoryJanoshik Analytical

MethodHPLC / MS

SampleBPC-157 · GP-2408-B157

HPLC Purity99.6%

Identity (MS) Confirmed

Result Passed

The Lab

Who is Janoshik — and why trust it?

New to research peptides? The lab name won't mean much yet. Here's why it's the standard the field relies on — and why an independent report is worth more than any claim we could make ourselves.

An independent lab — not usJanoshik Analytical is a separate laboratory with no affiliation to G Peptide Labs. We submit samples; they run the analysis and issue the certificate. We can't grade our own work.

The field's testing standardJanoshik is one of the most widely used independent labs in the research-peptide space, relied on specifically for peptide identity and purity analysis.

Two tests, togetherHPLC measures how pure a lot is; mass spectrometry confirms the molecule is the right one. A sample can be highly pure and still be the wrong compound — running both closes that gap.

Results you can verify — and no one can editEvery report is hosted on Janoshik's own platform with a unique key you can check yourself. Once issued, an independent record can't be altered — that's the whole point of third-party testing.

COA Library

Recent released lots

Every live batch, with a direct link to its independent Janoshik report. Match the LOT printed on your vial to the row below.

Library last updated October 13, 2026

CompoundLotPurityCertificate

BPC-157 · 10mg202603161099.9% View report ↗

Cognitive Stack · 2 vials—Verified — see contents View report ↗

GHK-Cu · 100mg202607910099.4% View report ↗

GLOW · 70mg2026033170Content verified View report ↗

KLOW · 80mg202607638099.0% View report ↗

Longevity Stack · 2 vials—Verified — see contents View report ↗

NAD+ · 500mg2026066500Content verified View report ↗

Recovery Stack (Wolverine) · 2 vials—Verified — see contents View report ↗

Retatrutide · 10mg202607121099.82% View report ↗

Retatrutide · 20mg202607122099.87% View report ↗

Retatrutide · 30mg202606123099.72% View report ↗

Selank · 10mg202607301099.1% View report ↗

Semax · 10mg202607291098.8% View report ↗

SS-31 · 50mg202607285099.83% View report ↗

Tesamorelin · 10mg202603211099.8% View report ↗

Tirzepatide · 30mg202606103099.87% View report ↗

Tirzepatide · 40mg202606104099.87% View report ↗

Tirzepatide · 60mg202606106099.86% View report ↗

How to read a COAA Certificate of Analysis lists the tested identity, HPLC purity, net peptide content, and appearance for one specific production lot. Because peptides are made in discrete batches, always match the lot number on your vial to the certificate, a generic, lot-less "COA" verifies nothing.

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Every lot third-party tested · Stocked & shipped in Canada · Canada Post Xpresspost, discreet packaging · Interac & crypto accepted

Lab testing & certificates of analysis

Tested by Janoshik.

Who is Janoshik — and why trust it?

Recent released lots

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