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How to read a certificate of analysis

A COA is only useful if it matches the thing in your hand. Three checks that take about a minute, and what a document has to do to count.

How to read a certificate of analysis
Aug 16, 2026Zook'd AF

A certificate of analysis is a lab's report on a specific batch of product. It is the difference between a company telling you what is inside something and a third party measuring it.

It is also easy to wave around without meaning anything. So here is what we hold a document to, and what you can check yourself in about a minute.

1. It has to match the batch

This is the one people skip. A certificate only counts if the batch number printed on it matches the batch number printed on the pack you are holding. A COA for a different run of the same product tells you about that run, not yours.

If the numbers do not match, you do not have documentation. You have a document.

2. It has to come from a third party

Testing done in-house is a spec sheet. It might be accurate and it might be careful, but it is not verification, because the party with something to lose ran the test. An outside lab has no stake in the answer.

3. It has to be readable

If you need a chemistry degree to work out what a document says, the job is half done. That is our problem to solve, not yours — which is why the label facts on every product page are written in plain English and sit right next to the COA status.

Where ours live

Every batch we release gets its own document, posted in the lab library. You can search it by product, lane or batch number.

The library is currently empty, and it says so. Nothing is posted there yet because nothing has cleared yet. When a document exists, it appears. Until then the page says pending, which is a real answer.

Adult use only, 21+.