Guide

How independent testing works.

A certificate of analysis from an independent lab is the document this registry stores. Here is how buyers get one, what it costs, and how to read it.

Step 1 — Choose a testing lab

Two labs currently dominate independent peptide testing for consumers. Both accept mailed samples and return results within 1-3 weeks.

Step 2 — Prepare the sample

• Do NOT reconstitute — send the lyophilized vial as-is, sealed.
• Include the original vial with any labeling or lot number.
• Note the vendor, purchase date, and any batch/lot info on the submission form.
• Pack with bubble wrap in a rigid mailer. Vials are fragile.

Step 3 — Order the tests

For most peptides, order "Identity + Purity" at minimum. This tells you whether the peptide exists and how pure it is. For a full picture add "Net Content" (how much actual peptide vs filler) and "Endotoxin + Sterility" if you're worried about contamination.

Freedom Diagnostics, listed rates: purity and identity $200, net content $25. The usual order of both is $225. Endotoxin is $175, sterility is $150, and heavy metals are $100, and each of those needs another vial. Conformity is $50 a vial. Ten or more samples are 5% off. Twenty or more are 10% off.

Step 4 — Interpret the results

A pass result should show:

• Identity confirmed — mass spec shows correct molecular weight for that peptide
• Purity ≥ 95% for pharma-grade equivalent (98%+ is excellent)
• Net content matches label — a 5mg vial should test ~5mg (±10%)
• No unexpected peaks in the chromatogram at unusual retention times

Step 5 — Submit to the registry

Whether your COA passed or failed, contribute it here. Passed COAs help legitimate vendors build reputation. Failed COAs protect the next buyer. Every submission makes the registry more useful.