# Kanna (Sceletium tortuosum)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/kanna
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-19
**Evidence Score:** 6 / 10
**Category:** African
**Also Known As:** Sceletium tortuosum, Kougoed, Channa, Canna, Kanna root, Tortuose fig-marigold, Hottentot fig

## Overview

Kanna (Sceletium tortuosum) is a South African succulent containing mesembrine alkaloids that inhibit [serotonin reuptake](/ingredients/condition/mood) and phosphodiesterase-4. Research shows potential anxiolytic and mood-enhancing effects, though human clinical trials remain limited.

## Health Benefits

• Mood enhancement and stress reduction (traditional use, preclinical evidence only)
• Anxiolytic (anti-anxiety) effects (animal models, no human RCTs available)
• Potential antidepressant activity via [serotonin reuptake](/ingredients/condition/mood) inhibition (in vitro studies)
• [Anti-inflammatory](/ingredients/condition/inflammation) properties (preclinical reviews, no human trials)
• [Antimicrobial](/ingredients/condition/immune-support) effects (laboratory studies only, clinical evidence lacking)

## Mechanism of Action

Kanna's primary alkaloids mesembrine, mesembrenone, and mesembrenol inhibit [serotonin reuptake](/ingredients/condition/mood) by blocking the serotonin transporter (SERT). These compounds also inhibit phosphodiesterase-4 (PDE4), increasing cAMP levels and potentially reducing neuro[inflammation](/ingredients/condition/inflammation). The dual action on serotonergic pathways and PDE4 may contribute to its anxiolytic and mood-regulating effects.

## Clinical Summary

Human research on kanna remains extremely limited, with most evidence derived from animal studies and in vitro research. Preclinical studies in rats have demonstrated anxiolytic effects at doses equivalent to 25-50mg in humans, with reduced anxiety-like behaviors in elevated maze tests. Small preliminary human trials suggest potential mood benefits, but no large-scale randomized controlled trials have been published. Current evidence is insufficient to establish clinical efficacy or optimal dosing protocols.

## Nutritional Profile

Kanna (Sceletium tortuosum) is a succulent plant used primarily for its psychoactive and medicinal alkaloid content rather than as a macronutrient source. Macronutrient contribution is nutritionally negligible at typical supplemental doses (25–100mg extract). Primary bioactive compounds include mesembrine (primary alkaloid, ~0.3–2.3% dry weight in whole plant material, higher in standardized extracts), mesembrenone (~0.1–1.0% dry weight), mesembrenol, and mesembranol — collectively comprising the 'mesembrine-type alkaloids' typically totaling 0.5–2.5% in raw dried plant material. Standardized commercial extracts (e.g., Zembrin®) are typically standardized to 0.35–0.4% total alkaloid content with defined mesembrine:mesembrenone ratios (~3.5:1). Oxalates are present as calcium oxalate crystals in the plant tissue, consistent with many succulent plants, though precise concentrations are not well-documented in literature. Fiber content is present as structural plant cellulose but quantitative data specific to Sceletium are limited in nutritional databases. Mineral content (calcium, potassium, magnesium) reflects typical succulent plant composition but is not nutritionally significant at supplemental doses. No meaningful vitamin content has been characterized. Bioavailability: mesembrine alkaloids are reported to be well-absorbed orally with relatively rapid onset (30–60 minutes), with some evidence of sublingual absorption being faster; first-pass hepatic [metabolism](/ingredients/condition/weight-management) is anticipated but pharmacokinetic data in humans remain limited to single-dose studies with Zembrin® extract.

## Dosage & Preparation

Traditional monograph suggests 50-200 mg of dried, powdered herb (equivalent to 1-4 mg alkaloids) in tablets or capsules, taken 2-3 times daily. Traditionally chewed dried throughout the day, or prepared as teas, decoctions, or tinctures without quantified dosages. No standardized clinical dosing established. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Kanna may interact with antidepressants due to its [serotonin reuptake](/ingredients/condition/mood) inhibition, potentially causing serotonin syndrome when combined with SSRIs or MAOIs. Common reported side effects include mild sedation, headache, and gastrointestinal discomfort at higher doses. Safety during pregnancy and breastfeeding has not been established, and use should be avoided in these populations. Individuals taking psychiatric medications should consult healthcare providers before use.

## Scientific Research

The research dossier reveals no human clinical trials, RCTs, or meta-analyses have been conducted on Kanna. Available evidence consists solely of preclinical reviews examining biological properties in vitro and animal models, with one referenced abstract mentioning acute effects in rats but providing no human trial data.

## Historical & Cultural Context

Sceletium tortuosum has been used for centuries in South African indigenous medicine as a mood-elevating plant, often chewed dried or fermented to treat stress, anxiety, and suppress hunger. Historical phytochemical studies date back to 1898, with traditional practices including regular chewing (frequency self-limited by mild hypnotic effects), teas, and decoctions.

## Synergistic Combinations

Rhodiola rosea, L-theanine, Ashwagandha, Passionflower, Magnesium glycinate

## Known Interactions

| Substance | Severity | Summary | URL |
|---|---|---|---|
| Damiana | SAFE | 🟢 SAFE — Kanna and Damiana can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/damiana |
| Muira Puama | SAFE | 🟢 SAFE — Kanna and Muira Puama can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/muira-puama |
| Horny Goat Weed | SAFE | 🟢 SAFE — Kanna and Horny Goat Weed can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/horny-goat-weed |
| Yohimbe | SAFE | 🟢 SAFE — Kanna and Yohimbe can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/yohimbe |
| Dexamethasone | SAFE | 🟢 SAFE — Kanna and Dexamethasone can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/dexamethasone |
| Fludrocortisone | SAFE | 🟢 SAFE — Kanna and Fludrocortisone can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/fludrocortisone |
| Cabergoline | SAFE | 🟢 SAFE — Kanna and Cabergoline can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/cabergoline |
| Bromocriptine | SAFE | 🟢 SAFE — Kanna and Bromocriptine can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/bromocriptine |
| Octreotide | SAFE | 🟢 SAFE — Kanna and Octreotide can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/octreotide |
| Letrozole | SAFE | 🟢 SAFE — Kanna and Letrozole can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/letrozole |
| Anastrozole | SAFE | 🟢 SAFE — Kanna and Anastrozole can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/anastrozole |
| Raloxifene | SAFE | 🟢 SAFE — Kanna and Raloxifene can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/raloxifene |
| Fluticasone | SAFE | 🟢 SAFE — Kanna and Fluticasone can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/fluticasone |
| Tiotropium | SAFE | 🟢 SAFE — Kanna and Tiotropium can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/tiotropium |
| Theophylline | SAFE | 🟢 SAFE — Kanna and Theophylline can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/theophylline |
| Roflumilast | SAFE | 🟢 SAFE — Kanna and Roflumilast can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/roflumilast |
| Benzonatate | SAFE | 🟢 SAFE — Kanna and Benzonatate can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/benzonatate |
| Pau d'Arco | SAFE | 🟢 SAFE — Kanna and Pau d'Arco can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/pau-darco |
| Andrographis | SAFE | 🟢 SAFE — Kanna and Andrographis can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/andrographis |
| Goldenseal | SAFE | 🟢 SAFE — Kanna and Goldenseal can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/goldenseal |

## Frequently Asked Questions

### What is the active compound in kanna?

The primary active compounds are mesembrine alkaloids, particularly mesembrine, mesembrenone, and mesembrenol, which comprise 0.3-2.3% of the dried plant material. Mesembrine is considered the most pharmacologically active component.

### Can kanna be taken with antidepressants?

Kanna should not be combined with SSRIs, SNRIs, or MAOIs due to risk of serotonin syndrome from additive serotonergic effects. A washout period of at least 2 weeks is recommended when transitioning between these substances.

### What is the recommended kanna dosage?

Traditional doses range from 50-200mg of standardized extract daily, though optimal dosing remains unestablished due to limited clinical research. Most commercial supplements contain 25-100mg per serving of standardized extract.

### How long does kanna take to work?

Acute effects may be noticed within 30-60 minutes of consumption, while mood-related benefits may require consistent use over 2-4 weeks. Duration of effects typically lasts 2-4 hours per dose.

### Is kanna legal in the United States?

Yes, kanna is legal in the United States and is classified as a dietary supplement ingredient. However, it cannot be marketed with specific medical claims without FDA approval.

### What forms of kanna are available and do they differ in effectiveness?

Kanna is available in multiple forms including dried leaf powder, liquid extracts, capsules, and tinctures, with extraction methods varying between manufacturers. Currently, no human clinical trials directly compare the bioavailability or efficacy of different kanna forms, so effectiveness differences remain unclear. Most traditional use has been with dried leaf preparations chewed or smoked, while modern supplements often use standardized extracts. The lack of head-to-head human studies means form selection should be based on personal preference and product quality rather than proven superiority.

### Is kanna safe during pregnancy and breastfeeding?

No safety data exists for kanna use during pregnancy or breastfeeding, and it should be avoided during these periods as a precaution. Kanna's serotonin-modulating properties theoretically could affect fetal development or pass into breast milk, but this has not been studied in humans. Pregnant and breastfeeding individuals should consult their healthcare provider before considering kanna supplementation. The lack of safety evidence makes avoidance the most prudent approach until clinical data becomes available.

### How strong is the clinical evidence for kanna's mood and anxiety benefits in humans?

Clinical evidence for kanna's mood and anxiety effects in humans is currently very limited, with most research restricted to animal models and in vitro studies. No large randomized controlled trials (RCTs) in humans have definitively proven kanna's efficacy for depression, anxiety, or stress reduction. A small number of preliminary human studies suggest potential benefits, but these are insufficient to establish safety and effectiveness standards comparable to prescription medications. More rigorous human clinical trials are needed before kanna can be recommended as an evidence-based treatment for mental health conditions.

---

*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
*License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*