A kratom COA — short for certificate of analysis — is the single most important document you will never see on most kratom shelves. It is the third-party lab report that says what is actually in a batch of leaf: how much alkaloid, whether heavy metals are present, and whether the powder passed microbial testing. Learning to read one turns you from a shopper who trusts the label into a shopper who verifies it. This guide walks through a COA line by line so you know exactly what to look for.
What a COA Is, and Who Writes It
A certificate of analysis is a report produced by a laboratory that tested a specific batch of product. The key word is third-party: the lab is independent of the vendor, so the numbers are not marketing, they are measurements. A trustworthy COA names the lab, carries a date, and ties itself to a specific batch or lot number so you can match the paper to the jar in your hand. If a vendor shows you a single generic “we test our products” graphic with no lab name and no batch number, that is not a COA — that is a logo. We publish the real thing for every batch on our lab results page.
Reading a COA is a lot like reading a nutrition panel: you do not need to be a chemist, you just need to know which lines matter and what a passing result looks like. There are four sections worth your attention.
1. Alkaloid Content
The first section most people look for is the alkaloid profile. For kratom, this typically reports the percentage of mitragynine and, separately, 7-hydroxymitragynine — the two alkaloids labs most commonly quantify. On a COA these appear as percentages by dry weight. What matters for you as a reader is consistency and disclosure: a real lab reports specific numbers for the batch, rather than a vague claim. We are describing what the document shows, not what any amount does — a COA is a composition report, and that is exactly how you should read the alkaloid line. The value in seeing these numbers is consistency: a producer who reports the same figures batch after batch is demonstrating control over their sourcing and processing, while wild swings from one report to the next suggest the opposite. Think of the alkaloid section as a fingerprint of the batch, useful precisely because you can compare it against the batches that came before.
2. Heavy Metals
Because kratom is a plant grown in soil, heavy-metal testing is essential. A complete COA screens for the big four: lead, arsenic, cadmium, and mercury. Each is reported as a concentration, usually in parts per million or micrograms per unit, alongside a limit and a pass/fail. This is where independent testing earns its keep — you cannot see, smell, or taste heavy metals, so the lab report is the only way to know a batch is within accepted limits. When you scan a COA, confirm all four metals are listed and that each one shows a result under its stated limit.
3. Microbials
The third section covers microbiological testing — the screen for contamination that can occur with any agricultural product. A thorough panel looks for Salmonella, E. coli, total yeast and mold, and total aerobic bacteria. As with metals, each line carries a limit and a pass/fail result. Some COAs also report moisture content here, which relates to how well a powder resists mold over time. If a certificate skips microbial testing entirely, it is incomplete.
It also helps to know what a COA does not do. A certificate reports the composition of the batch that was tested — it is a snapshot, not a running guarantee for every future batch. That is why the date and batch number matter so much: a report from two years ago tells you nothing about the jar in front of you today. Good vendors test batch by batch and publish each one, rather than pointing every product at a single legacy report. When you evaluate a vendor, look for a habit of testing, not a one-time trophy.
- Find the headerConfirm the lab’s name, the report date, and a batch or lot number that matches your product.
- Read the alkaloid sectionLook for specific mitragynine and 7-hydroxymitragynine percentages reported for that batch.
- Check heavy metalsConfirm lead, arsenic, cadmium, and mercury are each listed and each passes its limit.
- Check microbialsConfirm Salmonella, E. coli, and yeast/mold are tested and passing.
- Match it to the jarCross-reference the batch number on the COA with the batch number on your package.
4. The Header Details That Prove It’s Real
The easiest way to tell a genuine COA from a decorative one is the header. A real report names an accredited laboratory, states the date the batch was tested, and carries a batch or lot number. That batch number is the thread that ties the document to your specific jar — without it, a COA could belong to any batch or none. When we talk about traceability from grove to jar, this is the paperwork that makes the claim checkable. A vendor willing to publish a dated, batch-matched, third-party report is a vendor inviting you to verify their work.
Why This Matters for Compliance and Craft
COAs are not just a nicety; in a number of states with consumer-protection rules for kratom, third-party testing and batch records are part of doing business at all. Beyond the legal picture — which we cover on our where we ship page and in our guide to state legality — testing is simply what craft looks like when it is honest. Anyone can call their leaf premium. A COA is the difference between saying it and showing it. When you know how to read one, you can hold every vendor, including us, to that standard. Browse our current batches on the lab results page and read a real one for yourself.
Frequently Asked Questions
What does COA stand for?
Certificate of analysis. It is a third-party laboratory report showing the tested composition of a specific batch of product, including alkaloid content, heavy metals, and microbial screening.
What should a complete kratom COA include?
An accredited lab name, a test date, a batch or lot number, alkaloid percentages (mitragynine and 7-hydroxymitragynine), heavy-metal results (lead, arsenic, cadmium, mercury), and microbial results (Salmonella, E. coli, yeast and mold).
How do I know a COA is genuine and not marketing?
Look for a named third-party lab, a date, and a batch number that matches your package. A generic “lab tested” graphic with no lab name or batch number is not a COA.
Why is heavy-metal testing important for a plant?
Kratom is grown in soil, and heavy metals cannot be seen, smelled, or tasted. Independent testing is the only way to confirm a batch falls within accepted limits for lead, arsenic, cadmium, and mercury.
Where can I see BuyKratomHere’s COAs?
Every batch is published on our lab results page, matched to its batch number so you can verify the jar you own.
BuyKratomHere products are for adults 21 and over, in states where kratom is legal. These statements have not been evaluated by the Food and Drug Administration. Our products are not intended to diagnose, treat, cure, or prevent any disease.