How We Test
Radical transparency starts with independent verification.
Why Testing Matters
Most peptide companies provide a Certificate of Analysis from their manufacturer. The problem? That's the supplier grading their own homework. A manufacturer's in-house CoA tells you what they want you to see, not necessarily what's in the vial.
At Purity Lab, every batch goes through independent third-party testing at a US-based analytical laboratory. We don't just trust our supplier's word. We verify it. If a batch doesn't meet our 98% purity threshold, it doesn't ship. Period.
We publish every test result. Not behind a login wall. Not as a blurry PDF. Right on the product page, linked to the specific batch number on your vial. This is what radical transparency looks like.
From Manufacturer to Your Doorstep
Product Received
Raw peptides arrive from our manufacturing partner with their in-house Certificate of Analysis.
Samples Pulled
Representative samples are pulled from each batch for independent verification.
Sent to Independent Lab
Samples ship to a US-based third-party analytical laboratory. Not our lab. Not our supplier's lab.
HPLC Purity Analysis
High-Performance Liquid Chromatography measures exact purity percentage of the peptide.
Mass Spec Identity
Mass Spectrometry confirms the molecular identity matches what's on the label.
Results Published
Test results are published on our CoA Library and linked to the specific batch number.
Quality Gate
If purity falls below 98%, the batch is rejected. No exceptions. No second chances.
Product Received
Raw peptides arrive from our manufacturing partner with their in-house Certificate of Analysis.
Samples Pulled
Representative samples are pulled from each batch for independent verification.
Sent to Independent Lab
Samples ship to a US-based third-party analytical laboratory. Not our lab. Not our supplier's lab.
HPLC Purity Analysis
High-Performance Liquid Chromatography measures exact purity percentage of the peptide.
Mass Spec Identity
Mass Spectrometry confirms the molecular identity matches what's on the label.
Results Published
Test results are published on our CoA Library and linked to the specific batch number.
Quality Gate
If purity falls below 98%, the batch is rejected. No exceptions. No second chances.
Independent Verification
Our testing is performed by accredited US analytical laboratories.
[Testing Lab Name]
ISO 17025 Accredited
Details about our testing partner will be published once our first batch is processed. We're committed to full transparency about who tests our products.
We'll update this section with our lab partner's full credentials and accreditation details.
How to Read a Certificate of Analysis
Not all CoAs are created equal. Here's what separates a real test from a rubber stamp.
Check the Lab Name
A legitimate CoA names the testing laboratory. If it just says 'tested' with no lab identified, that's a red flag.
Look for HPLC Results
High-Performance Liquid Chromatography is the industry standard for purity testing. If a CoA doesn't show HPLC data, it's incomplete.
Verify the Batch Number
Every CoA should reference a specific batch number that matches the label on your vial. Generic CoAs that don't reference a batch are worthless.
Check the Date
Testing should be recent and specific to the batch you received. A CoA from two years ago doesn't tell you anything about what's in your vial today.
Purity Percentage Matters
Research-grade peptides should test at 98% or higher. Anything below 95% is a concern. Below 90% is unacceptable.