How we verify every batch.

Independent HPLC purity testing, LC-MS identity confirmation, and a Certificate of Analysis on every order — that you can verify against the batch number on your vial. Here's exactly what that process looks like.

Why third-party testing matters

Almost every research peptide supplier claims their products are tested. The question is who tested them. When the manufacturer tests their own product, the results are exactly as trustworthy as the manufacturer's reputation — which, in this industry, is often unverifiable. When the supplier tests it themselves, it's the same problem one step removed. Independent third-party testing is the only structure where the lab's financial interest doesn't depend on the result.

That's why we don't test our own products. We send samples from every incoming batch to Freedom Diagnostics, an independent analytical laboratory operating in the United States. They run the panel, they generate the COA, they own the result. We don't see preliminary numbers. We don't get to ask for a re-test if we don't like the answer. The result is what the result is.

What we test for

Every batch goes through two independent analyses:

Identity confirmation (LC-MS)

Liquid chromatography coupled with mass spectrometry confirms that the molecule in the vial is actually the molecule on the label. The LC step separates the sample into its individual components by molecular weight; the MS step measures the exact mass of each component. The result is a mass spectrum showing characteristic peaks at the masses we'd expect for the target compound — typically the molecular ion plus its common protonated and deprotonated forms.

If the mass spectrum doesn't match the theoretical mass within a few parts per million, the batch fails identity. No exceptions, no "close enough."

Purity quantification (HPLC-UV)

High-Performance Liquid Chromatography with UV detection measures how much of the sample is actually the target compound versus impurities, degradation byproducts, or unreacted starting materials. The instrument pumps the sample through a separation column where compounds elute at different rates based on their chemistry; the UV detector measures the absorbance of each component as it passes by.

The chromatogram shows a tall peak at the retention time of the target compound and (ideally) very little else. The percentage on your COA is the area under the target peak divided by the total integrated area — that's your purity number.

Our internal cutoff is 99.0% minimum purity. Most batches come back at 99.5% or higher. Anything that fails goes back to the manufacturer; it never enters our shipping inventory.

Net content verification

Beyond identity and purity, the COA also reports net content— the actual mass of compound in the vial. A vial labeled 10mg should contain at least 10mg of the target compound after subtracting any residual moisture or counter-ions. Most of our products test in the 10.5-12mg range for a 10mg-labeled vial, which is normal and means you're getting the full advertised amount with a small excess for measurement variance.

How to read your COA

Every order ships with a downloadable Certificate of Analysis specific to your batch. The COA contains:

• Sample summary — product name, claimed dosage, lot number, appearance, received and reported dates.
• Analytical results table — identity (LC-MS), purity (HPLC-UV), and net content as numerical values.
• Chromatogram — the full HPLC trace. The big peak is your compound; small peaks elsewhere are impurities.
• Mass confirmation spectrum — the LC-MS scan showing which masses were detected. Matching peaks confirm identity.
• Lab signature — signed by the principal chemist at Freedom Diagnostics.

The lot number on the COA must match the lot number printed on your vial. If they don't match, contact us immediately — something has gone wrong with our shipping process and we want to fix it.

QR code verification

Every vial ships with a QR code that links directly to the COA for that specific batch. Scan it with your phone before uncapping — the document should match the lot number on the vial label. This is the single most important verification step you can do, and it takes about three seconds.

What about false COAs?

A common concern in this industry: how do you know the COA isn't fabricated? Two answers. First, Freedom Diagnostics maintains its own records— their COAs reference internal accession numbers (visible on the document), and the lab can verify directly whether a given accession number corresponds to a real test. If you ever doubt the document's authenticity, contact the lab directly. Second, fabricating a chromatogram and mass spectrum that actually look right requires either real data or substantial forensic effort — and the moment a competitor or customer ran independent verification on a fake batch, our entire business would end. The economic incentives align with us telling the truth.

What we test on every order vs. on every batch

We test every batchwe receive. A batch typically covers 50-200 vials. We don't test every individual vial — that would be financially impossible, and the chemistry of lyophilized peptides means a passing batch typically has uniform content across all vials in the production run. The COA you receive is the test result for the batch your specific vial came from.