How to Read a CBD Lab Report (COA) So You Know What You're Using

A Certificate of Analysis, or COA, is the single most useful document in CBD. It tells you what is actually inside the bottle, jar, or bath bomb you are about to use. The good news: you do not need a chemistry degree to read one.

Here is what to look for, in plain English.

1. Who issued the COA?

Look for the name of an independent, third-party lab at the top. The lab should be ISO 17025 accredited. If the COA is signed by the brand's in-house team, treat it as marketing, not a lab result.

2. Does the batch number match?

Every COA should list a batch or lot number. That number should match the one on the product you are holding. If they do not match, the COA is for a different batch and tells you very little about your bottle.

3. Cannabinoid profile

This is the table most people care about. It lists how much CBD, CBG, CBN, THC, and other cannabinoids the lab found, usually as a percentage and a mg per gram. Compare the CBD amount on the COA against what the product label claims.

For a THC-free, broad-spectrum product, the THC line should read ND (non-detect) or be well below the lab's limit of detection.

4. Contaminant tests

A complete COA also tests for pesticides, heavy metals (lead, arsenic, mercury, cadmium), residual solvents, microbials, and mycotoxins. Each section should be marked Pass or list values well under the legal limit.

If a brand only shows you a cannabinoid panel and never publishes contaminant tests, ask for the full COA before buying.

5. Date of the test

Cannabinoid content is most accurate close to the test date. For topical products, a COA from within the last 12-18 months is reasonable. Older than that, ask for a fresh one.

Our approach

Every product we sell, from CBD bath bombs to recovery creams, links to its current COA on the product page. If you cannot find it, email us and we will send it directly.

When in doubt, the rule is simple: no COA, no sale.