How to Read a Certificate of Analysis (COA)
What Is a COA and Why Should You Care?
If you've been shopping for CBD for any amount of time, you've probably seen the term "COA" thrown around. It stands for Certificate of Analysis, and it's basically a lab report that tells you exactly what's in the product you're buying. Every reputable CBD company has their products tested by an independent, third-party lab, and the COA is the result of that testing. Think of it as a receipt for honesty.
What to Look For
The first thing you'll see on most COAs is the cannabinoid profile. This section breaks down the levels of CBD, CBG, CBN, and other cannabinoids in the product. It's how you verify that the bottle claiming 1000mg of CBD actually contains 1000mg of CBD. If the numbers on the COA don't line up with what's on the label, that's a red flag.
You'll also want to check the THC content. For a product to be legally sold as hemp-derived CBD, it needs to contain less than 0.3% Delta-9 THC. The COA will show you the exact percentage. This is especially important if you're someone who gets tested at work or just wants to be sure about what you're putting in your body.
Beyond cannabinoids, a solid COA includes contaminant testing — things like heavy metals, pesticides, residual solvents, and microbial contaminants. This is the part that separates quality products from sketchy ones. If a company can't show you clean contaminant results, you probably don't want to be consuming what they're selling.
Finally, pay attention to the lab information itself. The COA should list the name of the testing laboratory, and that lab should be accredited and independent from the company selling the product. If a brand is testing their own products in-house and calling it a day, that defeats the whole purpose.
Why It Matters
The CBD industry is still pretty loosely regulated, which means not every product on the shelf is what it claims to be. A COA is the single best tool you have as a consumer to verify quality. It takes about two minutes to read one, and it can save you from wasting money on something that's underdosed, mislabeled, or worse.
At The CBD Store, we keep COAs on file for every product we carry. If you ever want to see one, just ask — we're happy to pull it up and walk you through it. You can also check out our COA page to browse lab results online. We think transparency matters, and we only stock brands that feel the same way.
