Kanna is one of the oldest documented mood-supporting plants in the world, and one of the most misunderstood. This guide explains what kanna is, how its chemistry works, what people actually report, the forms you will encounter, and where it stands legally in Germany — without hype and without medical claims. Where the evidence is thin, we say so. Where there is a real risk, we name it plainly.
This is the hub of our kanna content. Each section links to a deeper article when you want to go further. If you are deciding between kanna and a related plant, we also compare it directly with kratom and blue lotus.
What is kanna?
Kanna (also spelled channa or kougoed in its fermented form) is the common name for Sceletium tortuosum, a low-growing, creeping succulent in the family Aizoaceae (the ice-plant family). It is native to the semi-arid Karoo regions of South Africa, particularly the Western and Northern Cape. The kanna plant is small and unremarkable to look at, with fleshy leaves and pale star-shaped flowers — the active material is the leaf and stem, not the flower.
The plant is traditionally prepared by fermentation: harvested material is bruised and left to ferment over several days, a process called making kougoed (“something to chew”). Fermentation changes the balance of the plant's alkaloids and is part of why traditional kanna differs from a raw dried powder. Botanically, several closely related Sceletium species exist, but S. tortuosum is the one in commerce and the one this guide covers.
Mesembrine
How does kanna work? (Mechanism)
Kanna contains a group of mesembrine-type alkaloids — chiefly mesembrine, alongside mesembrenone, mesembrenol, and mesembranol. The exact ratio depends on chemotype, growing conditions, and whether the material was fermented [Smith et al., J Ethnopharmacol, 1996].
Two mechanisms are described in the literature. First, mesembrine is a potent serotonin reuptake inhibitor (SRI): it blocks the serotonin transporter (SERT), increasing serotonin availability in the synapse — broadly similar in direction to how SSRIs work, though kanna is a plant preparation and not a standardised drug [Harvey et al., J Ethnopharmacol, 2011]. Second, Sceletium extract inhibits phosphodiesterase-4 (PDE4), which raises intracellular cAMP — a mechanism not shared by conventional SSRIs [Harvey et al., 2011].
This dual SRI + PDE4 profile is what makes kanna pharmacologically distinctive. A 2013 imaging study reported that a standardised Sceletium extract (Zembrin) reduced threat-related amygdala reactivity in healthy volunteers — consistent with an anxiolytic direction of effect [Terburg et al., Neuropsychopharmacology, 2013]. We cover the chemistry in depth in the mesembrine compound profile.
Traditional and modern use
Kanna has one of the longest written records of any psychoactive plant. The first European account dates to 1662, when Jan van Riebeeck recorded Khoisan use of “kanna” at the Cape [Gericke & Viljoen, J Ethnopharmacol, 2008]. For Khoisan and early Cape communities, fermented kanna was chewed, used as snuff, or smoked for mood elevation and sociality; hunters also used it to blunt hunger and thirst on long treks, and it served as a valued trade good.
Modern interest grew from the 2000s, largely around the standardised extract Zembrin, which has been studied in small randomised trials for anxiolytic and cognitive endpoints [Nell et al., J Altern Complement Med, 2013] [Chiu et al., 2014]. Today kanna is sold as an ethnobotanical and functional-food plant across Germany and the EU. We frame its cultural origins with respect: kanna is part of living Khoisan heritage, not a novelty.
Effects — what users report
We describe effects the way the literature and user reports describe them — as what people report, not as guaranteed outcomes. Individual response varies with dose, form, the specific extract, and the person.
Commonly reported at low-to-moderate doses: a gentle lift in mood, reduced social tension, and a clear, focused head without the heaviness associated with sedating botanicals. Because the effect is largely serotonergic and short, many users describe kanna as a daytime plant rather than an evening one. At higher doses of strong extracts, some users report mild euphoria or, less pleasantly, nausea, headache, or jitteriness. For a fuller treatment, see kanna effects and experiences.
Forms and preparations
Kanna is sold in several forms, which differ mainly in concentration and route. Smoking or vaping kanna is sometimes discussed, but the evidence for it is weak and we do not emphasise it. Our own extracts and the differences between them are covered in kanna extract vs. powder, and you can browse the current range in the kanna collection.
| Form | How it is used | Notes |
|---|---|---|
| Raw / fermented powder (kougoed) | Chewed, sublingual, tea, or snuff | Closest to traditional use; lowest concentration; bulkier doses |
| Standardised extract (e.g. 5%, MZO) | Sublingual, capsules, or in water | Higher, more consistent alkaloid content; smaller doses; read the ratio |
| Tincture / liquid | Drops, usually sublingual | Fast onset; easy to titrate |
| Capsules | Swallowed | Convenient, pre-measured; slower onset |
| Tea | Steeped, then drunk | Gentle and traditional; milder and slower |
Typical dose ranges
The following are ranges described in the literature and traditional use, not a recommendation or a protocol. Concentration varies enormously between a raw powder and a strong extract, so the single most important rule is: read the product's strength and start at the low end. A deeper, form-by-form breakdown lives in kanna dosage. Inform yourself and, where relevant, consult a physician.
| Form | Range described in literature / tradition |
|---|---|
| Raw / fermented powder | roughly 100–1,000 mg, depending on chemotype and tolerance |
| Standardised extract (clinical, e.g. Zembrin) | studied at roughly 8–25 mg of standardised extract |
| Strong concentrated extracts | far smaller amounts; follow the product's stated strength |
Onset, duration, and tolerance
Taken orally or sublingually, users typically describe onset within roughly 20–45 minutes and a total duration of about 2–5 hours, with sublingual and tincture routes acting faster than capsules or tea. Effects are generally short and self-limiting. Regular daily use may lead to tolerance, and as a serotonergic preparation, mild psychological dependence is plausible with heavy long-term use; periodic breaks are sensible.
Interactions and contraindications
This is the most important safety section in the guide. Because mesembrine raises serotonin availability, kanna should not be combined with other serotonergic agents:
- SSRIs (e.g. citalopram, sertraline, fluoxetine)
- SNRIs (e.g. venlafaxine, duloxetine)
- MAO inhibitors
- Triptans and other serotonergic drugs
Combining kanna with these raises the risk of serotonin syndrome, a potentially serious condition; isolated case reports involving kanna exist in the literature [Gericke & Viljoen, 2008]. Kanna is also not recommended during pregnancy or breastfeeding, and is not intended for minors. If you take prescription medication, speak with a medical professional before using kanna.
Legal status in Germany and the EU
As of 2026, kanna (Sceletium tortuosum), its extracts, and the isolated alkaloid mesembrine are not listed in the German Narcotics Act (BtMG, Anlagen I–III), and they do not fall within the substance groups covered by the New Psychoactive Substances Act (NpSG). Kanna is therefore legal to possess, buy, and sell in Germany and is openly available through botanical and supplement retail channels.
Legal status can change and differs by country, so check local rules before travelling or ordering across borders. We keep a dedicated, updated breakdown in is kanna legal in Germany?, including the common “does kanna show on a drug test?” question (mesembrine is not targeted by standard drug-screening immunoassays). See also our full legal disclaimers.
Quality and sourcing
With kanna, quality means two things: knowing the strength and knowing the source. A “10x” or “5%” label only helps if the standard behind it is stated, so look for products that declare their extract ratio or alkaloid content and that publish lab testing. Good kanna is cleanly processed, free of fillers, and transparent about origin. At amama we source deliberately, test for purity, and state strengths plainly.
Common mistakes to avoid
- Ignoring the strength. Dosing a strong extract as if it were raw powder is the most common error.
- Combining with antidepressants. The single biggest risk. If you take an SSRI/SNRI/MAOI, do not use kanna.
- Using it at night. Kanna tends to be activating; many users find it disrupts sleep.
- Expecting a dramatic effect. Kanna is mild and short by nature.
- Buying on price alone. Without stated strength and lab testing, you cannot dose responsibly.
Frequently asked questions
What is kanna?
Kanna is the South African succulent Sceletium tortuosum, traditionally fermented and used for mood and sociality. Its main active alkaloid is mesembrine.
Is kanna legal in Germany?
Yes. Kanna is not listed under the BtMG and does not fall under the NpSG, so it is legal to buy, possess, and sell.
What does kanna feel like?
Users typically report a mild daytime mood lift, social ease, and a clear head. Effects are gentle and short (about 2–5 hours).
How does kanna work?
Its alkaloid mesembrine acts as a serotonin reuptake inhibitor and a PDE4 inhibitor.
Can I take kanna with antidepressants?
No. Do not combine kanna with SSRIs, SNRIs, or MAO inhibitors — there is a serotonin-syndrome risk.
How much kanna should I take?
It depends entirely on the form and strength. Start low and read the product's strength.
What is the difference between kanna extract and powder?
Extract is concentrated and dosed in much smaller amounts; powder is closer to traditional use. See our extract vs. powder article.
Does kanna show up on a drug test?
Mesembrine is not targeted by standard drug-screening immunoassays, so kanna is not expected to trigger a typical drug test.
How long does kanna take to work?
Sublingual and tincture routes are often felt within ~20–45 minutes; capsules and tea are slower.
Is kanna addictive?
It is not considered habit-forming at traditional doses, though tolerance and mild psychological dependence are plausible with heavy long-term use.
Kanna vs. kratom — what's the difference?
Different plants and mechanisms: kratom acts on opioid receptors, kanna on serotonin. See kratom vs. kanna.
Where can I buy kanna in Germany?
Through botanical/ethnobotanical retailers. Browse lab-tested extracts in our kanna collection.
Further reading
- Effects: Kanna effects and experiences
- Dosage & forms: How to dose kanna
- Legal & drug test: Is kanna legal in Germany?
- Forms: Kanna extract vs. powder
- Compare: Kratom vs. Kanna · Blue Lotus vs. Kanna
- Chemistry: Mesembrine — compound profile
- Shop: Kanna collection · Legal: Disclaimers
References
- Harvey, A.L., et al. (2011). Pharmacological actions of the South African medicinal and functional food plant Sceletium tortuosum and its principal alkaloids. Journal of Ethnopharmacology, 137(3), 1124–1129. PMID 22234675
- Nell, H., et al. (2013). A randomized, double-blind, placebo-controlled trial of Zembrin in healthy adults. J Altern Complement Med, 19(11), 898–904.
- Terburg, D., et al. (2013). Acute effects of Sceletium tortuosum (Zembrin) in the human amygdala. Neuropsychopharmacology, 38(13), 2708–2716.
- Gericke, N., & Viljoen, A.M. (2008). Sceletium — A review update. J Ethnopharmacol, 119(3), 653–663.
- Smith, M.T., et al. (1996). Psychoactive constituents of the genus Sceletium. J Ethnopharmacol, 50(3), 119–130.
- Chiu, S., et al. (2014). Proof-of-concept RCT of Sceletium tortuosum (Zembrin) targeting PDE4. Evid Based Complement Alternat Med, 2014, 682014.
- PsychonautWiki. Kanna. psychonautwiki.org/wiki/Kanna
- Erowid. Kanna / Sceletium Vault. erowid.org/plants/kanna
Last updated: 21 June 2026