The Purity Gap: Why 75% and 93% Aren't Just Numbers
When someone says purity, they usually mean the number on the label. But purity has layers — and understanding what separates a 75% freebase from a 93% isolate changes how you shop.
Street Bureau
MGM Alkz
The label says 75%. Another label says 93%. The price difference is significant. Is it worth it?
That question has a real answer — but only if you understand what the numbers mean.
What the Percentage Actually Represents
Purity percentages in botanical alkaloid products refer to the concentration of the target compound — in this case, mitragynine — relative to total mass. A 75% freebase contains 750mg of mitragynine per gram. A 93% isolate contains 930mg per gram.
The remaining percentage isn't inert. It's a mix of other alkaloids, residual solvents (if process controls are poor), plant matter, and processing byproducts. In a high-quality 75% freebase, the remaining 25% is mostly minor alkaloids — speciociliatine, paynantheine, mitraphylline. In a poorly processed product, that 25% could include residual extraction solvents.
Freebase vs Salt Form
The form matters as much as the percentage. Freebase alkaloids are the base compound — fat-soluble, with certain absorption characteristics. Salt forms (lactate, HCl) are created by reacting the freebase with an acid, producing a water-soluble crystalline powder with different bioavailability profiles.
Neither is objectively superior. They're different tools with different characteristics.
The Real Question
For most users, 75% freebase is the right starting point. It preserves more of the natural alkaloid profile and is forgiving on dosing. For those who want precision — exact, reproducible outcomes — 93% isolate gives you that control. You're trading complexity for precision.
The gap between 75% and 93% isn't just 18 percentage points. It's the difference between a full-spectrum product and a targeted one.
