Hemp & CBD Guide
What Is a Certificate of Analysis (COA) for Hemp Products?
If you only learn one thing about buying CBD, make it this: read the Certificate of Analysis. A COA is the third-party lab report that proves what is actually in your jar. Here is how to read one in 60 seconds and the red flags that should make you walk away.
Why a COA matters more than the label
Hemp is a lightly regulated category. Independent testing over the years has repeatedly found products that contained far less CBD than the label claimed — or contained contaminants nobody wants to ingest. The label is a marketing claim. The COA is the receipt.
Because hemp is a bio-accumulator (it pulls heavy metals and chemicals out of the soil it grows in), testing is not optional for a quality product. The COA is how a brand proves its hemp was clean and its dose is honest.
The four things a COA verifies
A complete COA covers four areas. Quality brands test for all of them; budget brands often test only potency and skip the contaminant panels because they cost more.
- Cannabinoid potency — how much CBD (and THC, CBG, CBN, etc.) is actually present, and confirmation that Delta-9 THC is under the 0.3% federal limit.
- Pesticides — screening for agricultural chemicals.
- Heavy metals — lead, arsenic, cadmium, mercury (the big four hemp pulls from soil).
- Residual solvents + microbials — leftover extraction solvents, plus mold, yeast, and harmful bacteria.
How to read a COA in 60 seconds
You do not need a chemistry degree. Here is the fast version.
| What to check | What you want to see |
|---|---|
| Lab name | An independent, third-party lab — not the brand itself. Bonus if it's ISO 17025 accredited. |
| Date + batch number | A recent date and a batch/lot number that matches the code on your product. |
| Total CBD | A number at or above the label claim (e.g. a 1500mg jar should test at ~1500mg or more). |
| Delta-9 THC | Under 0.3% by dry weight (or 'ND' / non-detect for THC-free products). |
| Contaminant panels | 'Pass' or 'ND' across pesticides, heavy metals, solvents, and microbials. |
Red flags that should stop you
If you run into any of these, treat it as a reason to buy from someone else. A brand confident in its product makes the COA easy to find.
- No COA available at all, or 'COA available on request' that never actually arrives.
- A COA with no date, or one that's years old.
- A generic COA that doesn't match your batch number.
- Potency that comes back well under the label claim.
- Missing contaminant panels (potency-only testing).
- A COA from the brand's own in-house lab rather than an independent one.
Where JGO publishes COAs
Jolly Green Oil has published per-batch Certificates of Analysis since 2017. Every product is tested by an independent lab for both potency and the full contaminant panel before it ships. If you ever want to verify the jar in your hand, the batch code on the label matches the COA on file.