A small succulent native to South Africa, traditionally used for its endurance-boosting properties, is now the focus of scientific scrutiny for its surprising effects on brain activity. Researchers have discovered that extracts from the kanna plant (Sceletium tortuosum) can alter key brain signals across multiple regions, potentially influencing mood, alertness, and stress response. This finding suggests that the plant’s historical use by San and Khoikhoi communities wasn’t simply based on folklore, but may have been rooted in a genuine physiological effect.
The study, published in the Journal of Ethnopharmacology, highlights the complex chemistry within kanna and demonstrates that not all versions of the plant are created equal. Variations in growing conditions – rainfall, soil composition, and temperature – can significantly impact the plant’s chemical makeup, leading to differing effects. This discovery underscores the importance of understanding the specific chemical profile of kanna when considering its potential therapeutic applications.
Kanna’s Impact on Brain Chemistry
The research, conducted on mice, revealed that extracts from kanna plants gathered in Touwsrivier and De Rust, South Africa, produced a consistent pattern of altered brain signals. Specifically, the extracts increased levels of noradrenaline, a neurotransmitter associated with alertness and focus, while simultaneously decreasing levels of GABA, a neurotransmitter that has a calming effect on the brain. This combination, researchers suggest, could have provided a beneficial effect for hunters needing sustained energy and focus during long expeditions. The study, as reported by Earth.com, found that these effects were more pronounced in wild-grown plants compared to a commercially available kanna product.
Catherine H. Kaschula, a chemist at Stellenbosch University, played a key role in identifying the specific compounds responsible for these effects. Her research pinpointed mesembrine alcohols and several lesser-known alkaloids as being particularly influential. Previous research had largely focused on mesembrine, but this study demonstrates the importance of considering the full spectrum of chemical compounds present in the plant.
Historical Use and Modern Relevance
The use of kanna dates back centuries, with records indicating that San and Khoikhoi communities chewed the plant, often in a fermented form called kougoed, to enhance endurance and focus. A report from The Conversation details how colonial records from the late seventeenth century document this practice, noting that communities would bruise the plant’s roots and stems before storing them for later use.
Interest in kanna has been renewed in recent years, particularly in the context of rising rates of anxiety and depression following the COVID-19 pandemic. The World Health Organization (WHO) reported a 25% increase in both anxiety and depression globally in the first year of the pandemic. This has led to a growing search for safer and more effective mental health treatments, and plants like kanna, with their potential to influence brain chemistry, are receiving increased attention.
However, researchers caution that the mouse data do not definitively prove that kanna has antidepressant or sedative effects in humans. Further research, including behavioral testing in mice and carefully controlled clinical trials in people, is needed to fully understand the plant’s potential therapeutic benefits. The variability in chemical composition also means that standardization of extracts will be crucial for reliable results.
As research progresses, a more nuanced approach to plant-based medicine – known as precision phytotherapy – is emerging. This approach emphasizes the importance of matching plant chemistry to intended use, recognizing that not all extracts are created equal. Respecting Indigenous knowledge while rigorously testing traditional uses will also be essential for unlocking the full potential of plants like kanna.
Disclaimer: This article is for informational purposes only and should not be considered medical advice. Consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.
The future of kanna research hinges on a deeper understanding of its complex chemistry and careful clinical trials. What remains clear is that this traditional South African plant holds intriguing potential, and further investigation is warranted. Share your thoughts on this fascinating research in the comments below!
