How to Read a Kratom Lab Report: The COA Cheat Sheet
A Certificate of Analysis is the only thing standing between you and contaminated kratom. Here's exactly what to look for, what the numbers mean, and how to spot fakes.
Why Lab Reports Matter
I'll be blunt: dirty kratom is a real problem, and it's not getting talked about enough. Heavy metals, salmonella, mold, E. coli — these aren't hypothetical risks. The FDA has issued multiple recalls on kratom products contaminated with salmonella. Independent tests have found kratom products with lead levels that would make a toxicologist flinch.
I learned this the hard way. Sometime in early 2018, I ordered a kilogram from a vendor I'd found through a Reddit post. The price was unbelievable — like, suspiciously cheap. I didn't think to ask for a lab report. Within a day of using it, I had stomach cramps, headaches, and a general feeling that something was off. I threw the entire bag away. That was the last time I bought kratom without checking the lab work first.
Here's the reality of the kratom supply chain: this is a plant that grows in Southeast Asia, gets harvested, dried, ground into powder, and shipped halfway around the world. At any point in that process, it can pick up contaminants. The drying process can introduce mold. The soil can contain heavy metals. Poor processing facilities can introduce bacteria. And unlike pharmaceutical products, kratom isn't regulated by the FDA, which means nobody is checking unless the vendor pays for testing themselves.
That's where the Certificate of Analysis comes in. A COA is your only real proof that the kratom you're putting into your body has been tested and cleared for safety. If a vendor doesn't publish lab results or refuses to share them when asked, that's not a minor inconvenience. That's a dealbreaker. Walk away.
What Is a COA?
A Certificate of Analysis (COA) is a document produced by a third-party laboratory that tests a specific batch of kratom for purity, potency, and safety. The key word there is "third-party." The vendor sends a sample to an independent lab, the lab runs a battery of tests, and the lab issues a report with the results. The vendor doesn't get to edit the results or cherry-pick which tests to show you.
A proper COA typically covers five areas: alkaloid content (potency), heavy metals, microbial contamination, pesticides, and identity verification. Some reports combine all five panels into a single document. Others issue separate reports for each panel. Both approaches are fine, as long as all five areas are covered.
The report will include a batch number or sample ID that matches the product you're buying, the date of testing, the name and contact information of the testing lab, and the actual test results with pass/fail indicators or numerical values. If any of these elements are missing, that's a red flag.
The 5 Things to Check on Every Lab Report
When you pull up a vendor's COA, here's exactly what to look at. I'll walk through each one in plain English.
1. Alkaloid Content
This tells you how potent the kratom actually is. The two numbers you care about are mitragynine percentage and 7-hydroxymitragynine (7-OH) percentage.
Mitragynine is the primary active alkaloid in kratom. For standard leaf powder, you want to see somewhere between 1.0% and 1.8%. Below 1.0% means the product is weak — either old, poorly processed, or just low-quality leaf. Above 1.5% is genuinely good stuff. If you see numbers above 2.0%, you're likely looking at an enhanced product or extract, not plain leaf.
7-OH is the more potent (and more controversial) alkaloid. In natural leaf, it should be under 0.1%. If it's significantly higher, the product has been enhanced or is an extract. That's not necessarily bad, but you should know what you're getting.
2. Heavy Metals
This is the panel that scares me the most, honestly. Kratom trees can absorb heavy metals from the soil, and some regions in Southeast Asia have higher concentrations than others. The four metals tested are lead, mercury, arsenic, and cadmium.
The acceptable limits come from USP <232> standards, which are the same standards used for dietary supplements in the United States. Here's what passing looks like:
| Heavy Metal | Acceptable Limit | What "Pass" Means |
|---|---|---|
| Lead (Pb) | <1.0 ppm | Below 1 part per million |
| Mercury (Hg) | <0.5 ppm | Below 0.5 parts per million |
| Arsenic (As) | <1.5 ppm | Below 1.5 parts per million |
| Cadmium (Cd) | <0.5 ppm | Below 0.5 parts per million |
If any of these numbers exceed the limits, that batch fails. Period. And if a vendor's report doesn't include a heavy metals panel at all, I treat that the same as a failure. You don't skip the most important safety test unless you're worried about what it would show.
3. Microbial Testing
This panel checks for bacteria, yeast, and mold. Remember those salmonella recalls I mentioned? This is the test that catches that. Here's what you should see:
- E. coli: Absent. Not "low levels." Not "within acceptable range." Absent.
- Salmonella: Absent per 25 grams of sample. Same deal — there's no acceptable amount of salmonella in your kratom.
- Total Aerobic Microbial Count (TAMC): Less than 10,000 CFU/g. CFU stands for colony-forming units, which is basically how many bacteria are in a gram of the product. Under 10,000 is the standard for botanical supplements.
- Total Yeast & Mold Count (TYMC): Less than 1,000 CFU/g. Higher counts mean the kratom wasn't dried or stored properly.
In plain English: E. coli and salmonella should be completely absent. The total bacteria and mold counts should be low. If you see "absent" and numbers well below the limits, that batch was processed and stored correctly.
4. Pesticides & Herbicides
Most kratom is wild-harvested or grown on small farms in Indonesia, so heavy pesticide use isn't as common as it would be with, say, commercial produce. But "not common" doesn't mean "never." Some larger operations do use agricultural chemicals, and those chemicals can end up in the finished product.
A good COA will test for a panel of common pesticides and herbicides, and the result you want to see is "not detected" or "ND" across the board. If specific pesticides are detected, the report should show that the levels are below acceptable limits. But honestly, I prefer to see "not detected" rather than "within limits." Why take the chance?
5. Identity Verification
This one gets overlooked, but it matters. Identity verification confirms that the sample is actually Mitragyna speciosa (kratom) and not some other plant material that's been mixed in or substituted. This is usually done through microscopic analysis or chemical fingerprinting.
Is it common for vendors to sell you something that isn't kratom? No. But it has happened, particularly with cheaper products from unverified sources. An identity test takes the guesswork out of it. If a COA includes identity verification, it tells me the lab and the vendor are both being thorough.
Red Flags on Lab Reports
Watch Out For These
- No batch number: A lab report without a batch number can't be matched to a specific product. It could be from any batch, any time. It might even be fabricated. Every legitimate COA has a sample or batch identifier.
- Self-tested (not third-party): If the vendor tested it themselves in their own facility, that's not a real COA. You need an independent, accredited laboratory. The vendor and the tester should be two different entities.
- Old dates (more than 6 months): Lab reports should be batch-specific and recent. If the most recent COA on a vendor's website is from a year ago, they're either not testing new batches or not updating their public results. Both are bad.
- Missing heavy metal panel: If a COA shows alkaloid content and microbials but conveniently skips heavy metals, that's suspicious. Heavy metal testing is the most expensive panel, and cutting corners there is a major warning sign.
- Mitragynine under 1.0%: Low mitragynine doesn't mean the kratom is dangerous, but it does mean it's weak. You're paying for a product that's going to underperform. It may also indicate old or improperly stored inventory.
- Lab name you can't verify: Google the lab name. It should have a website, an address, and ideally ISO accreditation. If you can't find any information about the lab, the report may be fabricated.
Green Flags
Signs of a Trustworthy Vendor
- AKA-GMP certified: Vendors who've passed the American Kratom Association's Good Manufacturing Practice audit are held to specific testing standards. It's not perfect, but it's the closest thing the industry has to regulation, and it weeds out the worst offenders.
- QR codes linking to lab results: Some vendors, like Super Speciosa, put QR codes on their packaging that link directly to the COA for that specific batch. This is the gold standard for transparency. You scan the code, and you're looking at the lab results for the exact bag in your hand.
- Multiple test panels on one report: A COA that covers alkaloids, heavy metals, microbials, pesticides, and identity in a single comprehensive report shows that the vendor is doing full-spectrum testing, not just checking one box.
- Recent batch-matched testing: The best vendors test every batch and match each COA to a specific lot number on the product. If you email them with your lot number, they should be able to pull up the exact report for your purchase.
Lab Report Scorecard
Got a COA in front of you? Run through this checklist and I'll tell you how it stacks up.
Which Vendors Have the Best Lab Reports?
After reviewing COAs from dozens of vendors over the years, a few stand out for transparency:
Super Speciosa is, in my opinion, the gold standard for lab transparency in the kratom industry right now. They put a QR code on every single bag that links to the COA for that specific batch. You don't have to email them, dig through their website, or take their word for it. Scan the code and the report is right there. Their COAs cover all five panels, the testing is done by accredited third-party labs, and the results are consistently strong. If every vendor did what Super Speciosa does, the industry would be in much better shape.
Kraken Kratom has been in the game longer than almost anyone, and their testing program reflects that experience. They do comprehensive third-party testing on every batch and make results available on their website. As an AKA-GMP certified vendor, they're held to specific standards for quality control. Their lab reports consistently show solid mitragynine numbers and clean safety panels. You can check out Kraken's selection here.
Happy Hippo Herbals also provides solid lab documentation and maintains AKA-GMP certification. They're not quite as flashy about it as Super Speciosa, but the testing is thorough and the results are available if you ask.
For a full breakdown of vendor quality, testing practices, and my personal recommendations, check out my best kratom vendors guide. Every vendor on that list has been vetted for lab testing practices, not just product quality.
Frequently Asked Questions
Do all kratom vendors test their products?
Not even close. Many vendors, especially the smaller online shops and definitely the gas station brands, don't test at all. They buy bulk kratom from a broker, repackage it, and sell it with zero idea what's actually in it. AKA-GMP certified vendors are required to test every batch, which is one reason I strongly recommend sticking with certified vendors. If you ask a vendor for a COA and they can't produce one, find another vendor. It's that simple.
How do I know if a lab report is fake?
A few things to check: First, Google the lab name. A legitimate testing lab will have a website, a physical address, and usually ISO 17025 accreditation. If the lab name returns no results, that's a major red flag. Second, look for a batch or sample number on the report. A real COA is tied to a specific sample. Third, check the date. If it's more than 6 months old, it may not represent the current batch. Finally, look at the formatting. Real lab reports follow a professional, standardized format. Something that looks like it was thrown together in Word with no lab letterhead is suspicious.
What's a good mitragynine percentage?
For standard kratom leaf powder (not extracts), 1.0% to 1.8% mitragynine is the normal range. Anything above 1.3% is solid. Above 1.5% is excellent. Below 1.0% suggests the product is either weak, old, or improperly processed. If you see numbers above 2.0% on what's marketed as plain leaf, be skeptical — it may be enhanced with extract, which isn't necessarily bad but should be disclosed. For extracts, you'll see much higher percentages, sometimes 10-45%, and that's expected.
Should I avoid kratom without a COA?
Yes, and I'll die on this hill. Untested kratom is a gamble with your health. You have no way of knowing if it contains dangerous levels of lead, mercury, salmonella, or mold. The $5 you save buying from an untested source isn't worth the risk of heavy metal exposure or a foodborne illness. Stick with vendors who test every batch and make the results available. It's the bare minimum standard, and any vendor who can't meet it doesn't deserve your business.
Only Buy from Vendors You Can Trust
Every vendor on my list is lab-tested, AKA-GMP certified, and personally verified. No shortcuts.
See My Top-Rated Vendors