If you go to the Vendors home page, scroll all the way at the bottom, under header - Website - you see "Vintage Workshop" and the COA's will show Mitragynine Pseudoindoxyl in several different test samples at .119% - .140%
Just to clarify, Chat GPT:
Mitragynine Pseudoindoxyl (MP) should NOT naturally occur in measurable quantities in plain kratom leaf powder.
Itâs a rare, highly potent, semisynthetic kratom alkaloid.
Not found naturally in any significant quantity in unprocessed kratom leaf.
It's a metabolite â formed inside the human body after ingestion of mitragynine.
It can also be chemically synthesized via acid/heat treatment or during extract production.
If a lab test shows 0.140% MP in plain leaf, there are only a few possible explanations:
Most likely:
The vendor may have added extract powder containing pseudoindoxyl to enhance potency.
Or someone in the supply chain mixed in extract âdustâ or mitragynine-enriched residue during grinding.
0.140% is way too high to be natural. For comparison:
MP levels in actual kratom extracts (especially oxidized ones) might be ~0.05â0.2%.
In natural leaf, MP is usually undetectable (typically <0.001%, if any).
Possible (but less likely if the lab is reputable):
Lab ran extract samples with high MP previously and didnât clean equipment properly.
Cross-contamination between extract and leaf samples.
In theory:
If leaf is left wet and fermented improperly, some chemical conversion can take place, possibly converting mitragynine into oxidized byproducts (including MP).
This is still very minimal and would not explain 0.140% MP unless it was intentional.
MP is extremely potent (stronger than 7-hydroxymitragynine).
It acts as a mu-opioid agonist with biased signaling, making it attractive for extract spiking.
The presence of MP in âplain leafâ can cause unexpected strength, tolerance spikes, or health risks, especially for those using kratom for energy, not sedation.
Mitragynine Pseudoindoxyl should NOT be in plain leaf. If it's there, it's likely been added.
A COA showing MP in natural kratom powder is a red flag for spiking, especially if the vendor doesnât disclose using extracts.
Legit vendors will show zero or non-detectable levels in MP, 7-OH, and other post-extraction metabolites unless theyâre selling full-spectrum extracts.


