A Certificate of Analysis (COA) is the single most important document in the hemp industry, and yet most consumers have never seen one. A COA is a report generated by an independent, third-party laboratory that tests a hemp product for its cannabinoid profile, potency, and safety. If you're spending money on CBD, you deserve to know exactly what's in the bottle. Here's how to read one.
The Cannabinoid Profile
The first section you'll typically see on a COA is the cannabinoid profile. This lists the individual cannabinoids detected in the product — CBD, CBG, CBN, THC, and others — along with their concentrations, usually measured in milligrams per gram (mg/g) or as a percentage. The key numbers to check: Does the CBD content match what's on the label? Is the total THC below 0.3%? If either of these is off, that's a red flag.
Contaminant Screening
A thorough COA will include panels for heavy metals (lead, arsenic, mercury, cadmium), pesticides, residual solvents (chemicals used during extraction), and microbial contaminants (mold, bacteria). Each panel should show the tested levels alongside the acceptable limits. You want to see "ND" (not detected) or "pass" across the board. If a COA doesn't include contaminant testing, it's incomplete — and that's a problem.
Batch Numbers and Dates
Every COA should reference a specific batch number that matches the product you're holding. It should also show the date the testing was performed. If the COA is more than 12 months old, or if the batch number doesn't match, ask for an updated report. Reputable companies test every batch and make the results readily available — often via a QR code on the packaging. At Shanti's Lounge, we keep current COAs on file for every product we sell and are happy to walk you through them in person.
What to Do If You Can't Find a COA
If a brand doesn't publish COAs on their website or can't provide one when asked, that's the clearest warning sign in this industry. It doesn't necessarily mean the product is unsafe, but it means there's no way to verify that it is. Your health isn't something to gamble on. Stick with brands and retailers that prioritize transparency — it's the baseline, not a bonus.
Chris Williams
Navy Veteran · Founder, Shanti's Lounge
Chris is a disabled Navy veteran who turned his personal wellness journey into a mission to help others. After years of navigating chronic pain and the challenges of post-service life, he founded Shanti's Lounge to provide Westchester County with a trusted, education-first hemp retail experience. He believes in honesty over hype and community over commerce.