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Verification

Verified labs.

Which suppliers publish a certificate of analysis, what the word “verified” does and does not mean on this site, and how to read a COA before you trust a purity number.

64

Suppliers publishing COAs

1994

Listings with a document

83

Suppliers tracked

What “verified” means here.

A document exists, and we link to it

A listing is marked as having a COA when the supplier publishes one we can actually open. We link to the supplier’s own document rather than rehosting it, so you always read the original.

We do not run the tests ourselves

PepLookup does not operate a laboratory and does not commission testing. Every certificate shown here was produced by or for the supplier. We surface it so it can be read, not as our own endorsement of the result.

A COA is evidence, not a guarantee

A certificate describes one batch at one point in time. It cannot tell you what is in the vial you receive months later, and a document can be edited, reused across batches or issued in-house. Read it critically.

Suppliers publishing certificates.

Every supplier below has at least one listing with a certificate we can link to. Open a supplier to see which of their products carry one.

Read a COA properly

Our COA reader walks you through the green and red flags on a certificate, so you can judge a document before you trust the number printed on it.

Looking for the documents themselves?

The lab reports directory lists every certificate we have linked, by compound and supplier.

The directory

All vendors.

83 listed

Show all 83 vendors

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