Direct answer: A Certificate of Analysis (COA) is a lab report confirming a hemp product's actual cannabinoid content — including Delta-9, Delta-8, THCA, and CBD levels — along with screening results for contaminants like heavy metals, pesticides, and residual solvents. Reputable hemp brands provide a current, accredited-lab COA for every batch; if a brand can't produce one, treat that as a serious red flag regardless of the product's legal category.
What to Look for First
Check that the COA is from an ISO 17025 accredited lab, matches the specific batch or lot number on your product's packaging (not a generic or outdated report), and is recent — cannabinoid content and contaminant screening can vary batch to batch.
The Cannabinoid Panel
Confirm the Delta-9 THC percentage is at or below your state's legal threshold, and check the THCA number separately if your state applies (or will soon apply) a total-THC test — a product that passes a Delta-9-only check can still fail a total-THC standard if THCA is high.
The Contaminant Panel
A thorough COA also screens for heavy metals, pesticide residue, microbial contamination, and residual solvents (relevant for extracted products like vapes and concentrates). Missing any of these categories on an otherwise-legitimate-looking COA is worth asking the brand about directly.
FAQ
What does COA stand for?
Certificate of Analysis — a lab report verifying a hemp product's actual cannabinoid content and contaminant screening results.
Why does the lab need to be ISO 17025 accredited?
This accreditation reflects a recognized international standard for testing lab competence and reliability, making the results more trustworthy than an unaccredited lab's report.
Should I worry if a product doesn't have a COA?
Yes — treat the absence of a current, batch-matched COA as a significant red flag, regardless of how the product is marketed or what its legal status is.