How to Read a Kratom COA (Certificate of Analysis)
A step-by-step breakdown of every section on a kratom lab report — what the numbers should look like, what's normal, and what means the batch failed.
Why Every Kratom Buyer Should Read COAs
A Certificate of Analysis is the only document that objectively verifies what's in a kratom product. Not the vendor's marketing copy. Not customer reviews. Not the label design. The COA is the lab data — and it either supports or contradicts every quality claim the vendor makes.
Most kratom buyers never look at a COA. They trust the label, trust the brand, and assume the product is what it says it is. That assumption is justified when you're buying from an AKA GMP-certified vendor with a history of transparent testing. It's a gamble when you're not.
Reading a COA takes about 60 seconds once you know what to look for. This guide breaks down every section of a typical kratom COA so you can evaluate any product from any vendor with confidence.
Anatomy of a Kratom COA
A complete kratom COA has five core sections, plus several identifying elements that establish its legitimacy. Here's what each section tells you.
Lab Identity & Report Header
The top of any legitimate COA identifies the laboratory that performed the testing. This section should include the lab's full name, physical address, accreditation information (typically ISO 17025 or equivalent), and a unique report number. It should also include the date of analysis, the name or ID of the analyst, and the name of the client (the kratom vendor who submitted the sample).
What to verify: Is this a real, accredited laboratory? You can typically verify accreditation by searching the lab's name plus "accreditation" online, or by checking with the accrediting body. If the report lists no lab name, no accreditation, or a lab you can't find any information about, treat the report with extreme skepticism.
Sample Identification
This section identifies the specific product that was tested: the product name, the vendor's lot or batch number, the sample receipt date, and sometimes the product format (powder, capsule, extract). The batch number here should match the batch number printed on the product packaging you received.
What to verify: Does the batch number on the COA match the batch number on your product? If yes, this lab report applies to what you purchased. If no — or if there's no batch number at all — the COA doesn't verify your specific product, regardless of how good the results look.
Alkaloid Content (Potency Testing)
This is the section most buyers care about most. It reports the concentration of kratom's primary alkaloids — at minimum, mitragynine and 7-hydroxymitragynine (7-OH) — expressed as a percentage of the product weight.
| Alkaloid | Standard Leaf Range | Extract Range | Red Flag |
|---|---|---|---|
| Mitragynine | 1.0–2.0% | 5–45%+ | Leaf claiming >2.5% or exact same % across all batches |
| 7-Hydroxymitragynine | 0.01–0.05% | Variable | Leaf showing >0.1% (likely enhanced/adulterated) |
What to verify: Are the mitragynine and 7-OH percentages within normal ranges for the product type? For standard leaf, mitragynine between 1.0% and 2.0% is typical. Premium selections or Maeng Da strains may push toward 2.0–2.2%. Anything above 2.5% in a standard leaf product warrants scrutiny — it's possible but unusual, and could indicate an enhanced product that isn't disclosed as such.
For 7-OH, 0.01–0.05% is the natural range in unmodified leaf. If a "standard leaf" product shows 7-OH above 0.1%, the product may be enhanced with additional 7-OH — something that should be explicitly disclosed on the label.
Heavy Metals Panel
This section reports the detected levels of four metals that can accumulate in plant material: lead (Pb), cadmium (Cd), mercury (Hg), and arsenic (As). Results are typically reported in parts per million (ppm) or micrograms per gram (µg/g).
| Metal | Acceptable Limit | Result You Want |
|---|---|---|
| Lead (Pb) | < 0.5 ppm | Below limit or "Not Detected" |
| Cadmium (Cd) | < 0.5 ppm | Below limit or "Not Detected" |
| Mercury (Hg) | < 0.5 ppm | Below limit or "Not Detected" |
| Arsenic (As) | < 1.5 ppm | Below limit or "Not Detected" |
What to verify: All four metals tested. Results below the stated limits. If any metal exceeds the threshold, the batch failed — and a responsible vendor should have pulled it from sale before it reached you. "Not Detected" (ND) is the best result. Low but detectable levels below the limit are normal and acceptable. Exceeding even one threshold is a failure.
Microbial Testing Panel
This section screens for harmful microorganisms that could indicate contamination during harvesting, processing, or packaging.
| Microorganism | Acceptable Result | Failure Means |
|---|---|---|
| Salmonella | Not Detected (in 25g) | Batch must be discarded — serious pathogen |
| E. coli | Not Detected or < limit | Contamination from fecal matter or dirty water |
| Mold | Below limit (varies) | Improper drying or storage — moisture exposure |
| Yeast | Below limit (varies) | Same as mold — moisture and storage issues |
| Total Aerobic Count | Below limit (varies) | High general bacterial load — processing hygiene |
What to verify: All five markers tested. Salmonella and E. coli should always show "Not Detected." Mold, yeast, and total aerobic count have numeric limits that vary by lab and standard, but results should be well below whatever limit is stated. Any positive salmonella result is an automatic batch failure with no exceptions — this is a serious pathogen that has caused actual kratom recalls.
Your 60-Second COA Check
Verify the Lab
Is a real, accredited laboratory named on the report? Can you find them online with a verifiable address and accreditation?
Match the Batch
Does the batch/lot number on the COA match the batch number on your product packaging? If not, this report doesn't apply to your product.
Check Alkaloids
Is mitragynine in the expected range (1.0–2.0% for leaf, higher for extracts)? Does 7-OH look normal for the product type?
Check Metals
Are all four heavy metals (Pb, Cd, Hg, As) tested and below limits? Any exceedance = failed batch.
Check Microbials
Is salmonella "Not Detected"? Are E. coli, mold, yeast, and total aerobic count all below limits?
Check the Date
When was the analysis performed? A COA older than 12 months doesn't verify current product quality. Ideally within the last 3–6 months.
When the COA Raises Questions
Sometimes a COA reveals something unexpected. Here's how to interpret common scenarios.
Mitragynine is lower than expected. A "premium" product showing 0.9% mitragynine isn't necessarily bad — it's just not premium. The kratom is likely from a less mature harvest or a less alkaloid-rich batch. The label doesn't match the data, which is a labeling honesty issue more than a safety issue.
7-OH is higher than expected for standard leaf. If a product labeled as standard leaf powder shows 7-OH above 0.1%, it may have been enhanced with additional 7-OH. This should be disclosed on the label. If it isn't, the vendor is either unaware of what's in their product (quality control failure) or deliberately hiding it (honesty failure). Either way, a concern.
One metal is close to the limit but below it. This is technically a pass, but a batch consistently running near the heavy metals threshold suggests a supply chain that's marginal on this metric. It's worth monitoring — if subsequent batches show similar near-limit results, the vendor's sourcing may have a systemic issue.
The COA has no batch number. Without a batch number matching your product, the COA is meaningless for verification purposes. It may reflect a real test on a real batch — but you can't confirm it applies to what you received.
Frequently Asked Questions
What is a kratom COA?
A COA (Certificate of Analysis) is a lab report for a specific production batch documenting results from third-party testing for alkaloid content, heavy metals, and microbial contamination. It's issued by an independent, accredited lab and includes the batch number, date of analysis, lab name, and specific test results.
What mitragynine percentage should I expect?
Standard leaf: 1.0–2.0%. Premium/Maeng Da may reach 2.0–2.2%. Extracts: 5–45%+. Standard leaf claiming above 2.5% should be verified carefully — that's unusually high for unmodified leaf.
What heavy metal levels are acceptable?
Per USP guidelines: lead below 0.5 ppm, cadmium below 0.5 ppm, arsenic below 1.5 ppm, mercury below 0.5 ppm. Any result exceeding these means the batch failed and should not be consumed.
How do I verify that a COA is authentic?
Check for: a named, accredited lab with a verifiable address, specific batch number, date of analysis, analyst identification, and professional formatting. You can contact the named lab to verify they conducted the testing.
Should every batch have its own COA?
Yes. Each batch has a unique alkaloid profile from different harvests and processing. A single COA across multiple batches doesn't verify your specific product. Legitimate vendors publish COAs per batch with matching lot numbers.