Reference Guide
ISO/IEC 17025 is the international standard for the technical competence of testing laboratories. A lab that truly holds it has been assessed by an independent accreditation body. That is different from a lab simply stating it on its own website.
This guide sorts common peptide testing labs into two groups. The first group publishes an ISO/IEC 17025 accreditation claim. The second group could not be verified from the sources reviewed.
Read the second group carefully. A lab appearing there is not proven to lack accreditation. It means the claim was not confirmed, or the lab describes its system as aligned with the standard rather than accredited to it. The difference matters.
Prices vary by lab and by peptide. These ranges reflect published price lists from labs with public pricing, so you know what a fair quote looks like before you ask for one.
Starting prices shown next to each lab above are for a standard single-peptide test where the lab publishes pricing. Ranges and prices compiled from public lab price lists as of August 2026. Prices change. Confirm the current cost, sample requirements, and turnaround directly with the lab before you ship anything.
An accreditation claim on a website is a starting point, not proof. Before relying on it, confirm the certificate number on the accrediting body's public registry, such as A2LA, ANAB, PJLA, or an international equivalent.
Then check the scope of that accreditation. A lab can be accredited for one type of testing and not for peptide purity or identity analysis. Scope matters as much as the certificate itself.
You can also check the report itself. Every COA lists the lab that ran the test. Go to that lab's website and look for a Verify or COA lookup option, then follow their steps to pull up the report and confirm it is real.
If you want to understand peptides with more clarity and confidence, here is where to start.