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Radical transparency starts with independent verification.
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.
Raw peptides arrive from our manufacturing partner with their in-house Certificate of Analysis.
Representative samples are pulled from each batch for independent verification.
Samples ship to a US-based third-party analytical laboratory. Not our lab. Not our supplier's lab.
High-Performance Liquid Chromatography measures exact purity percentage of the peptide.
Mass Spectrometry confirms the molecular identity matches what's on the label.
Test results are published on our CoA Library and linked to the specific batch number.
If purity falls below 98%, the batch is rejected. No exceptions. No second chances.
Raw peptides arrive from our manufacturing partner with their in-house Certificate of Analysis.
Representative samples are pulled from each batch for independent verification.
Samples ship to a US-based third-party analytical laboratory. Not our lab. Not our supplier's lab.
High-Performance Liquid Chromatography measures exact purity percentage of the peptide.
Mass Spectrometry confirms the molecular identity matches what's on the label.
Test results are published on our CoA Library and linked to the specific batch number.
If purity falls below 98%, the batch is rejected. No exceptions. No second chances.
Our testing is performed by accredited US analytical laboratories.
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.
Not all CoAs are created equal. Here's what separates a real test from a rubber stamp.
A legitimate CoA names the testing laboratory. If it just says 'tested' with no lab identified, that's a red flag.
High-Performance Liquid Chromatography is the industry standard for purity testing. If a CoA doesn't show HPLC data, it's incomplete.
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.
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.
Research-grade peptides should test at 98% or higher. Anything below 95% is a concern. Below 90% is unacceptable.