Is Kanna Addictive? What the Research Says About Dependence and Tolerance

Any time you add a supplement to your wellness routine, it’s good to ask, “Can it become habit-forming?” We get this question a lot from people trying Kanna (Sceletium tortuosum) for the first time. And it’s a fair concern. Plenty of products that promise to improve mood or reduce stress eventually come with a catch. Some stop working unless you keep increasing the dose. Others leave you feeling worse when you stop taking them. And some genuinely can become addictive.

Fortunately, there is currently no evidence that standardized Kanna extracts produce the kind of addiction or physical dependence associated with substances like nicotine, opioids, or stimulant drugs. That doesn’t mean Kanna products should be used carelessly, but it does underscore the importance of understanding the difference between addiction, dependence, and tolerance when trying to determine supplement safety.

At a Glance

• Current research does not suggest that Kanna has significant addictive potential.

• Kanna works primarily by influencing serotonin signaling rather than strongly activating the brain’s dopamine-driven reward pathways.

• Most users do not report rapidly escalating serving sizes to achieve the same effect.

• Some experienced users choose to cycle Kanna periodically, although there is currently little clinical research demonstrating that cycling is necessary.

• As with any mood-supporting supplement, responsible use and following the manufacturer’s suggested serving are always recommended.

Addiction, Dependence, and Tolerance Aren’t the Same Thing

These three terms are often used interchangeably, but medically they’re describing very different things. Addiction is characterized by compulsive use despite harmful consequences. People continue seeking the addictive substance even when it negatively affects their health, relationships, or daily responsibilities. Physical dependence occurs when the body adapts to a substance over time, producing withdrawal symptoms if it’s stopped abruptly. Many prescription medications can produce dependency without being considered addictive. Tolerance simply means the body becomes less responsive to the same amount of a substance over time, requiring larger amounts to produce the same effect. It’s important to understand the differences between the three, because a product can produce one of these outcomes without producing the others.

What Research Says About Kanna’s Addictive Potential

Current research has not demonstrated that Kanna has the characteristics typically associated with addictive substances. Part of the explanation lies in how Kanna works. The primary alkaloid in Kanna, mesembrine, acts primarily as a serotonin reuptake inhibitor (SRI). Other naturally occurring alkaloids in the Kanna plant have demonstrated phosphodiesterase-4 (PDE4) inhibitory activity. 

That’s a very different mechanism from substances with well-established addiction potential and dependency risk, many of which produce large, rapid increases in dopamine within the brain’s reward circuitry. This distinction doesn’t make Kanna “risk-free,” of course. No supplement is. But it does help explain why Kanna’s clinical profile looks quite different from nicotine, cocaine, methamphetamine, or opioid medications.

Human studies involving standardized Kanna extracts have generally reported favorable safety profiles, with no indication of compulsive drug-seeking behavior or withdrawal syndromes characteristic of addictive drugs.

Does Kanna Build Tolerance?

Kanna does not appear to produce the rapid tolerance curve seen with many recreational substances.

Many long-term users report that they continue to experience consistent effects without continually increasing the strength of their doses. Published research remains somewhat limited, however, so scientists cannot yet say with certainty how tolerance develops over years of continuous use.

Some of our customers have told us they periodically take short Kanna tolerance breaks simply as part of a balanced, natural supplement routine. Others incorporate Kanna only when they anticipate stressful workdays, social situations, or periods requiring greater focus rather than taking it every day. (I generally take our Daily Mood Kanna Gummies on weekdays, but don’t take them over the weekend.)

If you’re interested in incorporating Kanna into a broader wellness routine, our article on Microdosing Kanna: A Beginner's Guide to Daily Flow and Focus explores daily use in greater detail.

Kanna vs. Other Common Substances

One reason Kanna is often misunderstood is that people naturally compare it to products they’re already familiar with. Here’s a look at how Kanna compares to caffeine, nicotine, and SSRIs.

Responsible Kanna Use

The fact that Kanna doesn't appear to be addictive doesn’t mean more is always better. Like virtually every botanical supplement, it’s important to use it responsibly. You can start by following the suggested serving listed on the product label. For our Kanna gummies and Kanna tablets, the serving size is a single gummy or tablet (taking no more than two total per day). Avoid the urge to continually increase your serving simply to chase stronger effects. Consider occasional breaks if you’re using Kanna regularly over extended periods. Avoid combining Kanna with medications that affect serotonin unless your healthcare provider advises it’s appropriate. And lastly, pay attention to how your own body responds rather than copying someone else's routine.

One advantage of standardized extracts over raw powders is consistency. Knowing approximately how much active alkaloid you’re taking makes it much easier to establish a routine that remains predictable over time. And it helps you not to accidentally take more than you need to.

When Should You Talk to Your Healthcare Provider?

Kanna is generally considered safe for use. But certain people should check with their healthcare provider before using it. This is especially true if you take antidepressants, particularly SSRIs, SNRIs, or MAOIs. Likewise, if you take prescription medications that affect mood or cognition, have bipolar disorder or another significant psychiatric condition, or are pregnant or breastfeeding. In short, if you have any questions about how Kanna may interact with your current medications, you should check in with a healthcare professional before taking it.

Final Thoughts

One of the reasons people ask whether Kanna is addictive is because they’ve been burned before. Maybe it was nicotine. Maybe it was relying on energy drinks to get through every afternoon. Maybe it was discovering that something which seemed harmless at first gradually became something they didn’t feel quite right without. That’s a healthy instinct. Asking those questions before trying any new supplement is exactly what responsible consumers should do.

Frequently Asked Questions

Is Kanna Addictive?

Current research has not found evidence that standardized Kanna extracts produce the compulsive drug-seeking behavior associated with addictive substances such as nicotine or opioids.

Does Kanna Cause Physical Dependence?

Available human studies have not identified withdrawal syndromes or significant physical dependence with Kanna, although long-term research remains limited.

Does Kanna Build Tolerance?

Most users do not report needing dramatically larger serving sizes over time. Research on long-term tolerance is still developing.

Can I Take Kanna Every Day?

For most healthy adults, Kanna appears to be well tolerated for daily use. Just make sure to follow the recommended serving size and check with your doctor if you’re taking any medications that might interact adversely with Kanna.

Should I Cycle Kanna?

There is currently no established clinical guideline requiring Kanna cycling. Some experienced users, though, choose to take occasional breaks as part of their overall herbal supplement routine.

References

• Terburg, D., S. Syal, L.A. Rosenberger, et al. (2013). Acute effects of Sceletium tortuosum (Zembrin), a dual 5-HT reuptake and PDE4 inhibitor, on amygdala reactivity to fearful faces in healthy participants. Neuropsychopharmacology. https://www.nature.com/articles/npp2013183

• National Center for Complementary and Integrative Health. (Updated 2025). Herbs at a glance. https://www.nccih.nih.gov/health/herbsataglance

• U.S. Anti-Doping Agency. (2025). Dietary supplements: What athletes need to know. https://www.usada.org/substances/supplement-connect/