We tell everyone to "check the COA" but nobody explains how to actually read one, so let's fix that. Takes two minutes once you know what you're looking at.

Step 1: Check who ran the test

The lab name should be at the top. Google it. A real third-party lab has a website, an address, and usually a license number. If the "lab" is the vendor themselves, that's not a COA, that's marketing.

Step 2: Match the batch

Every COA has a batch or lot number. It should match the batch printed on the product you're actually buying. A vendor showing you a COA from a different batch (or with no batch at all) is showing you a piece of paper, not proof.

Step 3: Check the date

Cannabinoids degrade over time. A COA from over a year ago tells you what the product WAS, not what it is. Fresher is better, especially for flower.

Step 4: Read the cannabinoid table

The two numbers that matter:

• THCa % - the potency you're paying for
  
• Delta-9 THC % - needs to be under 0.3% for the product to be sold as hemp
  

You'll also see "Total THC" which is calculated as: delta-9 + (THCa x 0.877). That 0.877 is there because THCa loses some weight when it converts. Total THC is the real-world potency number once you light it.

Step 5: Check the safety panels

A full panel COA also tests for pesticides, heavy metals, mold, and residual solvents, each with a PASS or FAIL. A lot of cheap vendors only pay for the potency test and skip safety panels entirely. For something you're putting in your lungs, full panel matters.

Step 6: Verify it's real

Most legit labs put a QR code or verification link on the COA that pulls up the original report on the lab's own website. Scan it. Photoshopped COAs are a real thing and this defeats them instantly.

If a vendor can't or won't provide a COA that passes these six checks, walk away. There are plenty who will.

Got a COA you're not sure about? Post it in this section and we'll take a look.