What Is Kanna Extract? Ratios, Standardization & Types (2026)

Raw kanna is the dried, sometimes fermented, whole plant — the traditional "kougoed" the Khoisan chewed for centuries. It works, but it's weak and inconsistent: alkaloid content varies by harvest, so a serving is measured loosely in the 50–400mg range and two scoops are rarely identical.

An extract solves the consistency problem by pulling the active alkaloids out of the plant matter and concentrating them. The result is far stronger per gram and — if the brand discloses a percentage — far more repeatable. That's the whole appeal: instead of guessing with bitter powder, you dose a known quantity of actives. The trade-off is that potency now lives in a number on the label, so reading that number correctly is the entire skill. For a format-by-format breakdown of how those doses scale, see our kanna dosage guide.

A ratio like 100:1 means roughly 100 parts raw plant were concentrated into 1 part extract. The bigger the first number, the more compressed — and the smaller your dose needs to be. A 5:1 is a gentle concentration you might measure in tens or hundreds of milligrams; a 200:1 is a serious concentrate measured by the milligram on a scale.

The catch: a ratio is not a guaranteed alkaloid percentage. Because raw-material potency varies between harvests, two 100:1 extracts from different batches can differ in actual strength. A ratio is an honest strength signal, but it's an approximation, not a verified figure. Here's the practical reference:

When a product gives both a ratio and a standardization, trust the standardization. When it only gives a ratio, treat it as strong-but-approximate and dose conservatively. Our best kanna extracts guide ranks the real products on exactly these disclosures.

Standardization means the extract is manufactured to contain a fixed, stated percentage of active alkaloids — for example "5% total alkaloids" or "3% mesembrine." Unlike a ratio, this is a verified figure that holds batch to batch, which is why it's the more reliable measure of how potent an extract really is.

Two percentages matter. Total alkaloids tells you the overall strength of the active fraction. Mesembrine percentage tells you the character: mesembrine is kanna's most potent serotonin-transporter alkaloid, so a high-mesembrine extract reads more stimulating and uplifting, while a low-mesembrine, mesembrenone-forward extract reads calmer. As Harvey et al. (2011) documented, kanna's effect comes from a dual mechanism — mesembrine is the strongest serotonin-reuptake inhibitor and mesembrenone the strongest PDE4 inhibitor — so the alkaloid mix, not just the total, shapes what you feel.

If one extract has earned a definition all its own, it's Zembrin. It's a roughly 2:1 extract standardized to about 0.35–0.45% total alkaloids and deliberately formulated to be low in mesembrine and forward in mesembrenone — a calmer, gentler profile than the high-mesembrine concentrates. Nearly every human clinical study on kanna used Zembrin at a 25mg daily dose.

That's why it anchors the whole category. In a 2013 brain-imaging study, a single 25mg dose of Zembrin measurably reduced amygdala reactivity to fearful faces (Terburg et al., 2013, n=16). A 3-week trial found 25mg/day improved cognitive flexibility versus placebo (Chiu et al., 2014, n=21). And a 3-month placebo-controlled RCT in 37 adults found both 8mg and 25mg daily doses well-tolerated, with no significant changes in vitals or blood chemistry (Nell et al., 2013).

For a deeper look at the patented extract itself, see our Zembrin explainer, and for the plant it's made from, our guide to Sceletium tortuosum.

Supplement note: kanna and Zembrin are sold as botanical supplements. These statements have not been evaluated by the FDA, and kanna is not intended to diagnose, treat, cure, or prevent any disease.

Two extracts at the same total-alkaloid percentage can still feel different, because of how the alkaloids are balanced.

A full-spectrum extract preserves the plant's natural ratio — mesembrine, mesembrenone, mesembrenol and the rest in roughly the proportions kanna grows them. That keeps the complete dual mechanism intact and tends to read as a rounded, balanced effect. A standardized full-spectrum extract (say, 5% total alkaloids / 3% mesembrine) gives you both a known dose and the whole profile.

A high-mesembrine isolate or concentrate deliberately skews toward mesembrine — products like LiftMode's MT55 push 5%+ alkaloids weighted heavily to mesembrine. Because mesembrine is the strongest serotonin-transporter alkaloid, these read as more stimulating and uplifting, and they're more potent per milligram, which is exactly why they demand a milligram scale and experience.

The more concentrated an extract, the more a small dosing error matters — and the more the one mechanism-based caution matters too. Because kanna acts on serotonin much like an SSRI does: