TL;DR: Sceletium tortuosum — commonly known as Kanna — is one of Southern Africa's oldest and most respected plant medicines. Used for centuries by the Khoikhoi and San peoples to calm the mind, ease anxiety, and lift the mood, modern science is now confirming what traditional healers always knew. This guide explains what Sceletium is, how it works in the body, and what the research says.
What Is Sceletium Tortuosum?
Sceletium tortuosum is a small, succulent plant that grows naturally in the dry, rocky landscapes of the Western Cape, Northern Cape, and Eastern Cape provinces of South Africa. It has small yellow or white flowers and fleshy leaves that store water — perfectly adapted to the harsh, semi-arid conditions of the Karoo and Namaqualand.
The name Sceletium comes from the Latin word for skeleton — a reference to the plant's distinctive skeletal leaf structure when dried. But it's the common name, Kanna, that most South Africans recognise. The Khoikhoi and San peoples have used this plant for thousands of years, long before any Western scientist gave it a Latin name.
Today, Sceletium is gaining global attention as a natural mood support plant — and for good reason. The science behind it is genuinely impressive.
Is Sceletium the Same as Kanna?
Yes. Kanna, Channa, and Kougoed (meaning "something to chew" in Afrikaans) are all common names for Sceletium tortuosum. The name varies by region and community, but they all refer to the same plant.
A History Rooted in Southern Africa
The use of Sceletium in Southern Africa dates back at least 2,000 years — and likely much longer. Rock art and archaeological evidence suggest the San people used it in ritual and daily life. Early European explorers documented its use extensively from the 1600s onwards.
Jan van Riebeeck's journals from 1662 describe the Khoikhoi trading Sceletium with great enthusiasm. The Dutch explorer Simon van der Stel wrote in 1685 that the Khoikhoi would chew, smoke, or sniff the plant to relieve hunger, thirst, and fatigue — and to enter states of calm and wellbeing.
Traditional uses included:
- Chewing the fermented plant material (kougoed) to ease anxiety and stress
- Using it as a mood lifter after difficult hunts or long journeys
- Applying it topically to relieve pain
- Using it in social and ceremonial contexts to promote connection and calm
- Giving it to children in small amounts to ease colic and pain
This is not a plant that was used occasionally. It was woven into the daily and ceremonial life of Southern African communities for generations.
How Does Sceletium Work? The Science Explained Simply
Sceletium contains a group of alkaloids — naturally occurring plant compounds — that act directly on the brain and nervous system. The most important of these are mesembrine, mesembrenone, and mesembrenol.
These alkaloids work through two main mechanisms:
1. Serotonin Reuptake Inhibition (SRI)
Serotonin is often called the "feel-good" neurotransmitter. It plays a key role in regulating mood, anxiety, sleep, and emotional resilience. Many pharmaceutical antidepressants — called SSRIs (Selective Serotonin Reuptake Inhibitors) — work by preventing the brain from reabsorbing serotonin too quickly, keeping more of it available in the brain.
Sceletium's mesembrine alkaloids do something very similar — naturally. A landmark 2013 study published in the Journal of Ethnopharmacology confirmed that Sceletium extract acts as a serotonin reuptake inhibitor, helping to keep serotonin available in the brain for longer. (PubMed)
The result: a calmer, more balanced mood — without the harsh side effects associated with pharmaceutical SSRIs.
2. PDE4 Inhibition
This is where Sceletium gets really interesting. PDE4 (phosphodiesterase-4) is an enzyme in the brain that, when overactive, contributes to anxiety, cognitive decline, and inflammation. Inhibiting PDE4 has been shown to improve memory, reduce anxiety, and support brain health.
The same 2013 study confirmed that Sceletium's mesembrenone alkaloid is a potent PDE4 inhibitor — making it one of the very few natural substances known to work through this pathway. This dual mechanism (SRI + PDE4 inhibition) is what makes Sceletium uniquely effective compared to other mood-supporting plants.
What Does This Mean in Practice?
In plain terms: Sceletium helps your brain hold onto the chemicals that make you feel calm, connected, and clear-headed — while also reducing the brain activity associated with anxiety and mental fog. It doesn't sedate you. It doesn't create dependency. It simply helps your brain work the way it's supposed to when it's not overwhelmed by stress.
What Does the Research Say?
The clinical evidence on Sceletium is growing steadily. Here are some of the key findings:
Anxiety and Stress Reduction
A 2014 randomised, double-blind, placebo-controlled trial published in the Journal of Ethnopharmacology found that a standardised Sceletium extract (Zembrin®) significantly reduced anxiety scores in healthy adults compared to placebo. Participants reported feeling calmer and less reactive to stress. (PubMed)
Cognitive Function
A 2014 study in the Journal of Psychopharmacology found that Sceletium extract improved cognitive flexibility and executive function in healthy adults — the mental skills needed for problem-solving, decision-making, and adapting to new situations. (PubMed)
Safety Profile
Multiple studies have confirmed that Sceletium is well-tolerated at recommended doses, with no significant adverse effects reported in clinical trials. Unlike pharmaceutical mood medications, it does not appear to cause dependency, withdrawal symptoms, or emotional blunting.
Who Can Benefit from Sceletium?
Sceletium is not a medicine and should not replace professional mental health treatment. But as a daily wellness support plant, it may be particularly helpful for people who:
- Experience everyday anxiety, worry, or nervous tension
- Feel emotionally flat, low in mood, or lacking motivation
- Struggle with stress-related mental fatigue or brain fog
- Want natural support for emotional resilience without pharmaceutical side effects
- Are looking for a gentle, non-sedating way to feel calmer and more centred
It is also used by people who work in high-pressure environments — healthcare workers, teachers, social workers, and caregivers — who need to stay emotionally regulated and mentally sharp throughout the day.
Is Sceletium Safe? Important Cautions
For most healthy adults, Sceletium is considered safe at recommended doses. However, there are important interactions to be aware of:
- Do not combine with SSRIs or SNRIs (antidepressants like fluoxetine, sertraline, venlafaxine) — combining two serotonin-affecting substances can cause serotonin syndrome, a potentially serious condition
- Do not combine with MAOIs (a class of older antidepressants)
- Avoid during pregnancy and breastfeeding without medical supervision
- Use with caution if you have a history of bipolar disorder — consult your psychiatrist first
- Not recommended for children without professional guidance
If you are on any chronic medication, always consult your doctor or pharmacist before adding any new supplement to your routine.
Sceletium and South African Heritage
It is worth pausing to appreciate what this plant represents. In a world where most wellness trends originate in the Global North — Silicon Valley biohackers, European supplement companies, American wellness influencers — Sceletium is something different. It is a gift from the oldest cultures on earth, the Khoikhoi and San peoples of Southern Africa, who understood this plant's power long before modern neuroscience had the tools to explain it.
The growing global interest in Sceletium is both an opportunity and a responsibility. At Terupharma, we believe that honouring indigenous plant knowledge means more than just selling the extract. It means telling the story honestly, sourcing responsibly, and ensuring that the communities whose ancestors discovered this plant benefit from its growing recognition.
South Africa has extraordinary botanical wealth. Sceletium is one of its greatest gifts to the world.
What to Expect When You Start Using Sceletium
Unlike pharmaceutical medications, Sceletium does not require weeks to build up in your system. Many people notice a gentle calming effect within 30–60 minutes of their first dose. With consistent daily use, the mood-balancing and anxiety-reducing effects tend to deepen over 2–4 weeks.
Most people describe the experience as:
- A quiet sense of calm — not sedation
- Feeling more emotionally steady and less reactive
- Clearer thinking and better focus
- A gentle lift in mood without feeling artificially stimulated
It does not make you feel "high" or disconnected. It simply takes the edge off — in the best possible way.
Frequently Asked Questions About Sceletium (Kanna)
What is Sceletium tortuosum used for?
Sceletium tortuosum (Kanna) is used primarily to support mood, reduce anxiety, and improve emotional resilience. It has also been studied for its cognitive benefits, including improved focus and mental clarity. It is used as a daily wellness supplement, not a pharmaceutical treatment.
Is Kanna the same as Sceletium?
Yes. Kanna, Channa, and Kougoed are all common names for Sceletium tortuosum. The name varies by region and cultural community but refers to the same plant.
Is Sceletium legal in South Africa?
Yes. Sceletium tortuosum is legal in South Africa and is not a scheduled substance under the Medicines and Related Substances Act. It is sold as a food supplement. It is also legal in most countries, though regulations vary — check your local laws if ordering internationally.
Can I take Sceletium with antidepressants?
No — this is a critical safety point. Sceletium should not be combined with SSRIs, SNRIs, or MAOIs (common antidepressant medications) due to the risk of serotonin syndrome. Always consult your doctor before use if you are on any psychiatric medication.
How long does Sceletium take to work?
Many people notice a gentle calming effect within 30–60 minutes of their first dose. Deeper mood-balancing effects typically develop over 2–4 weeks of consistent daily use.
Does Sceletium cause dependency or withdrawal?
Clinical studies have not found evidence of dependency or withdrawal with Sceletium at recommended doses. Unlike pharmaceutical mood medications, it does not appear to cause emotional blunting or require tapering when discontinued.
Where does Sceletium grow in South Africa?
Sceletium tortuosum grows naturally in the Western Cape, Northern Cape, and Eastern Cape provinces of South Africa — particularly in the Karoo, Namaqualand, and Succulent Karoo biomes. It thrives in dry, rocky, semi-arid conditions.
Disclaimer: This article is for informational and educational purposes only and does not constitute medical advice. Sceletium tortuosum is not intended to diagnose, treat, cure, or prevent any disease or mental health condition. These statements have not been evaluated by the South African Health Products Regulatory Authority (SAHPRA). If you are experiencing symptoms of depression, anxiety, or any mental health condition, please consult a qualified healthcare practitioner. Do not combine with prescription psychiatric medications without medical supervision.
Author: Shamim Nong | Terupharma