What is 7-OH?
7-Hydroxymitragynine (often abbreviated as 7-OH or 7-OHM) is one of the key alkaloids found in the kratom plant. While mitragynine is the most abundant alkaloid in kratom leaves, 7-OH is far more potent at the mu-opioid receptor. In plain leaf kratom, 7-OH exists in very small quantities, typically less than 0.02% of total alkaloid content.
The extract market has changed this picture dramatically. Modern extraction processes can isolate and concentrate 7-OH to levels that are orders of magnitude higher than what occurs naturally. This is the compound that makes "enhanced" and extract products feel fundamentally different from plain leaf.
7-OH has been estimated to be roughly 13 times more potent than morphine at the mu-opioid receptor in some studies. This doesn't mean a 7-OH product is "13x morphine," but it does mean that small differences in dose can have significant effects.
How potency works
When a product label says "70% 7-OH" or "contains 100mg 7-OH," it's telling you (in theory) the concentration of this specific alkaloid. Understanding this math is essential for calculating your actual dose.
Percentage-based labeling: If a 1 gram (1000mg) extract powder is labeled as "7% 7-OH," it theoretically contains 70mg of 7-hydroxymitragynine. That's the active compound you're actually dosing.
Fixed-dose labeling: Some products (especially tablets and capsules) list a specific milligram amount, like "15mg 7-OH per tablet." This is more straightforward but equally dependent on the accuracy of the label.
The problem is that both methods are only as reliable as the manufacturer's testing. And as we'll cover next, a lot of them aren't reliable at all.
The math you need to know
Weight of powder (mg) x Potency percentage = Active alkaloid content (mg)
For example: 500mg of extract at 14% 7-OH = 70mg of 7-hydroxymitragynine. You can use our Potency Calculator to do this math instantly.
Why labels lie
This is one of the biggest problems in the kratom extract market. Labels frequently overstate the 7-OH content, sometimes dramatically. A product claiming 100mg of 7-OH per serving might actually contain 14mg. There are several reasons this happens.
No regulatory requirement: Kratom isn't FDA-regulated like supplements or pharmaceuticals. There's no agency requiring verification of label claims before a product hits shelves. Vendors can print whatever they want.
Conflating total alkaloids with 7-OH: Some labels list total alkaloid content but present it as if it's all 7-OH. A product might contain 100mg of total alkaloids (mitragynine, 7-OH, and dozens of others) but only 14mg of actual 7-OH. The label says "100mg" and lets you assume.
Outdated or fabricated COAs: Some vendors display COAs from batches that no longer exist, or from entirely different products. Some simply fabricate them.
It's common to find smoke shop products labeled as containing 100mg of 7-OH per serving, when third-party testing reveals the actual content is between 10-20mg. This isn't a rounding error. It's the difference between a dose and a very different dose.
Risk factors
7-OH carries a higher risk profile than plain leaf kratom. This doesn't mean it's inherently "bad," but it does mean you need to be more careful and more informed.
Tolerance builds faster: Due to its higher receptor affinity, regular use of 7-OH extracts can build tolerance more quickly than plain leaf. Users who switch from plain leaf to extracts often find they can't go back to plain leaf without it feeling ineffective.
Withdrawal is more intense: Physical dependence from high-potency 7-OH products tends to produce more uncomfortable withdrawal symptoms than plain leaf dependence. The higher the potency and the longer the use, the more significant this becomes.
Dose sensitivity: Because 7-OH is so potent, small errors in measurement or unexpected potency variations between batches can mean the difference between a comfortable experience and an unpleasant one. This is why accurate labeling and COA verification matter.
Respiratory concerns: At high doses, 7-OH's activity at the mu-opioid receptor raises theoretical concerns about respiratory depression, particularly when combined with other CNS depressants like alcohol, benzodiazepines, or other opioids.
Do not combine 7-OH extract products with alcohol, benzodiazepines, other opioids, or other CNS depressants. This combination can be dangerous.
Reading a COA
A Certificate of Analysis (COA) is a document from a third-party laboratory that tests a product and reports what's actually in it. A legitimate COA should contain several key elements.
Lab name and accreditation: The testing laboratory should be named and ideally ISO-accredited. Look for labs that specialize in botanical or pharmaceutical testing.
Batch/lot number: This should match the batch number on the product you purchased. If it doesn't, the COA might be from a different batch entirely.
Date of analysis: The test should be recent and relevant to the product currently being sold. A COA from two years ago doesn't tell you anything about what's in today's batch.
Alkaloid breakdown: The report should list specific alkaloid content: mitragynine percentage, 7-hydroxymitragynine percentage, and ideally other alkaloids. This is where you verify the label's claims.
Contaminant testing: A good COA will include testing for heavy metals (lead, arsenic, cadmium, mercury), microbial contamination (E. coli, salmonella, yeast, mold), and pesticide residues.
Compare the 7-OH percentage on the COA to what's claimed on the product label. If the label says 70% 7-OH and the COA shows 12%, you know the label is misleading. Our reviews always compare label claims against available COA data.
Legal status
The legal landscape for 7-OH is evolving rapidly and varies significantly by jurisdiction. Several U.S. states have moved to specifically ban or regulate 7-hydroxymitragynine while leaving plain leaf kratom legal. This is partly why newer compounds like MGM-15 are being developed as alternatives.
Because this changes frequently, we recommend checking current legislation in your specific state or country before purchasing any 7-OH product. Organizations like the American Kratom Association (AKA) maintain updated state-by-state tracking.
Harm reduction tips
Always verify the COA. Don't take the label at face value. Ask the vendor for a current COA that matches the batch you're buying. If they can't or won't provide one, buy from someone who will.
Start low. If you're trying a new product or a new vendor, start with a fraction of what you think your dose might be. Different products at the same listed potency can feel very different.
Use a scale. "Eyeballing" extract powder is a bad idea. A milligram scale accurate to at least 0.01g is inexpensive and essential. Scoops are not dosing devices.
Track your intake. Use our Intake Tracker or just keep notes. Knowing how much you're actually using day to day helps you catch tolerance escalation early.
Don't mix with other substances. Especially alcohol, benzos, or other opioids. This is how people end up in emergency rooms.
Have a plan for breaks. If you're using 7-OH products regularly, plan tolerance breaks or taper periods. Our Tolerance & Tapering guide covers practical strategies.