The kratom COA — a certificate of analysis — might be the most important piece of paper you’ll almost never find posted on a kratom shelf. It’s the independent lab report spelling out what a batch of leaf actually contains: its alkaloid figures, whether heavy metals show up, and whether the powder cleared microbial screening. Once you can read one, you shift from a shopper who takes the label’s word for it to one who checks it. This guide goes down a COA line by line so you know precisely what to hunt for.
What a COA Is, and Who Produces It
A certificate of analysis is a report a laboratory writes up after testing one specific batch of product. The phrase that matters is third-party: the lab stands apart from the vendor, so the figures aren’t marketing — they’re measurements. A COA you can trust names the lab, carries a date, and pins itself to a particular batch or lot number, letting you line the paper up against the jar in your hand. When a vendor waves a generic “we test our products” badge with no lab named and no batch number, that’s not a COA — it’s a logo. We post the genuine article for every batch on our lab results page.
Reading one has a lot in common with reading a nutrition panel: no chemistry degree required, just a sense of which lines count and what a passing mark looks like. Four sections deserve your attention.
1. The Alkaloid Profile
The section most people scan for first is the alkaloid profile. With kratom, it usually lists the percentage of mitragynine and, on its own line, 7-hydroxymitragynine — the two alkaloids labs quantify most often. A COA states these as percentages by dry weight. What counts for you as a reader is disclosure and consistency: a real lab prints specific numbers for the batch instead of a hand-wavy claim. We’re describing what the document reports, not what any amount does — a COA is a composition report, and the alkaloid line is meant to be read that way and no other. The worth of these figures is consistency: a producer whose numbers hold steady batch after batch is showing command of their sourcing and processing, whereas figures that lurch around from one report to the next point the other direction. Read the alkaloid section as a fingerprint of the batch, valuable exactly because you can hold it up against the batches before it.
2. Heavy Metals
Since kratom is a plant pulled from soil, testing for heavy metals is non-negotiable. A full COA screens the big four — lead, arsenic, cadmium, and mercury. Each shows up as a concentration, generally in parts per million or micrograms per unit, next to a limit and a pass-or-fail mark. This is the spot where independent testing really pays for itself: heavy metals give off no sight, smell, or taste, so the lab report is your only window into whether a batch sits inside accepted limits. As you look a COA over, make sure all four metals appear and that every one comes in under its stated limit.
3. Microbial Screening
The third section handles microbiological testing — the check for contamination that can crop up with any crop-grown product. A well-built panel runs down the usual culprits: Salmonella, E. coli, total yeast and mold, and total aerobic bacteria. As with the metals, each line comes with a limit and a pass-or-fail result. A few COAs tuck moisture content in here as well, which ties to how well a powder holds off mold over time. A certificate that leaves microbial testing out altogether is an incomplete one.
It’s worth knowing what a COA does not do, too. A certificate reports the makeup of the one batch that got tested — it’s a snapshot, not a standing promise about every batch still to come. That’s why the date and the batch number carry so much weight: a report from two years back says nothing about the jar sitting in front of you now. Good vendors test batch by batch and publish each result, rather than aiming every product at one aging report. Sizing up a vendor, look for a testing habit, not a one-time trophy on the wall.
- Start at the headerCheck off the lab’s name, the report date, and a batch or lot number that matches your product.
- Work through the alkaloidsLook for specific mitragynine and 7-hydroxymitragynine percentages listed for that exact batch.
- Scan the heavy metalsMake sure lead, arsenic, cadmium, and mercury each appear and each clears its limit.
- Scan the microbialsMake sure Salmonella, E. coli, and yeast/mold were tested and came back passing.
- Tie it to your jarCross-check the batch number on the COA against the one printed on your package.
4. The Header Details That Prove It’s Genuine
The quickest way to separate a real COA from a decorative one is the header. A legitimate report names an accredited laboratory, gives the date the batch was tested, and carries a batch or lot number. That batch number is the thread stitching the document to your particular jar — strip it away and a COA could belong to any batch, or to none. When we mention traceability from grove to jar, this is the paperwork that makes the claim something you can actually check. A vendor happy to publish a dated, batch-matched, third-party report is a vendor asking you to verify the work.
Why It Matters for Compliance and Craft
A COA isn’t just a nice touch; across a number of states with consumer-protection rules for kratom, third-party testing and batch records are simply the cost of doing business. Past the legal picture — which we lay out on our where we ship page and in our guide to state legality — testing is just what honest craft looks like. Anybody can slap “premium” on their leaf. A COA is the line between claiming it and proving it. Once you can read one, you can hold every vendor, us included, to that bar. Have a look at our current batches on the lab results page and read a real one for yourself.
Frequently Asked Questions
What does COA actually stand for?
Certificate of analysis. It’s an independent laboratory report laying out the tested makeup of one specific batch of product — alkaloid content, heavy metals, and microbial screening.
What belongs on a complete kratom COA?
You want to see a named accredited lab, the date of testing, and a batch or lot number, plus three sets of results: the alkaloid percentages for mitragynine and 7-hydroxymitragynine, the heavy-metal readings for lead, arsenic, cadmium, and mercury, and the microbial findings for Salmonella, E. coli, and yeast and mold.
How can I tell a COA is real and not just marketing?
Check for a named third-party lab, a date, and a batch number matching your package. A generic “lab tested” graphic with no lab name and no batch number doesn’t qualify as a COA.
Why does a plant need heavy-metal testing?
Kratom comes up out of soil, and heavy metals leave no trace you can see, smell, or taste. Independent testing is the only way to confirm a batch stays within accepted limits for lead, arsenic, cadmium, and mercury.
Where do I find Wild Root Kratom’s COAs?
We publish every batch on our lab results page, each tied to its batch number so you can verify the jar you own.
Wild Root Kratom is meant for adults 21 and older, and only where kratom is legal under state law. The Food and Drug Administration has not evaluated these statements. Nothing we carry is intended to diagnose, treat, cure, or prevent any disease.