What is a COA?
A Certificate of Analysis is a document from a third-party laboratory that tests a product and reports exactly what's in it. For kratom products, a COA typically covers alkaloid content (mitragynine, 7-hydroxymitragynine, and sometimes other alkaloids), contaminant screening (heavy metals, microbial, pesticides), and verification of the product's identity.
The key word is third-party. A COA from the manufacturer's own in-house lab is worth significantly less than one from an independent, accredited testing facility. The whole point is independent verification.
Why it matters
Labels lie. Not always intentionally, but frequently enough that you can't take them at face value. A product claiming 100mg of 7-OH per serving might contain 14mg. A product claiming 45% MIT might be 20%. Without a COA, you're guessing at your dose, and with concentrated extracts, guessing can mean the difference between a comfortable experience and a bad one.
This applies to every kratom product type: plain leaf, MIT extracts, 7-OH products, pseudomitragynine, MGM-15, all of it. If it has an alkaloid content claim on the label, a COA is how you verify that claim.
Contaminant testing matters too. Kratom is an agricultural product. Heavy metals, E. coli, salmonella, mold, and pesticide residues are all real possibilities, especially with cheaper, less reputable suppliers.
How to read one
Lab name and accreditation: Look for the lab's name, address, and accreditation status. ISO 17025 accreditation is the gold standard. If the lab isn't named or you can't verify it exists, that's a problem.
Batch/lot number: This should match the batch number on your specific product. A COA for batch #2024-051 doesn't tell you anything about batch #2025-003. Vendors sometimes display outdated COAs from older batches.
Date of analysis: Should be recent and relevant to the product currently on shelves. A COA from two years ago is stale data.
Alkaloid breakdown: This is the money section. It should list specific alkaloid percentages: mitragynine, 7-hydroxymitragynine, and ideally others. Compare these numbers to what the product label claims. If the label says 70% 7-OH and the COA says 12%, you have your answer.
Contaminant results: Look for pass/fail or specific measurements for heavy metals (lead, arsenic, cadmium, mercury), microbial counts (total aerobic, yeast, mold, E. coli, salmonella), and pesticide screens.
Red flags
No lab name: A COA without a clearly identified, verifiable lab is worthless.
Mismatched batch numbers: If the batch on the COA doesn't match your product, it's not relevant to what you're holding.
Only alkaloid testing, no contaminants: A partial COA is better than nothing but still incomplete. Reputable vendors test for both.
Numbers that perfectly match the label: Ironically, if the COA shows exactly the same number as the label to the decimal point, that can be suspicious. Real lab results almost never land on perfectly round numbers.
Vendor refuses to provide one: If a vendor can't or won't produce a COA for a specific batch, that tells you everything you need to know about their quality control.
When there's no COA
No COA means no verification. You're trusting the label and the vendor's word. For plain leaf, this is less risky since alkaloid concentrations in plain leaf are naturally lower and more consistent. For extracts, especially 7-OH, pseudo, and MGM-15 products, no COA is a dealbreaker. The potency ranges are too wide and the stakes are too high to guess.
If you're buying from a smoke shop and they can't show you a COA, consider buying from an online vendor who can. The price difference is usually worth the peace of mind.