Summary
Dr. Willoughby Britton, clinical psychologist and associate professor at Brown University, discusses the rarely-discussed adverse effects of meditation. Her research investigates why negative effects happen, who is most vulnerable, and which practices are best or worst suited for different conditions including trauma and mood disorders.
Key Points
- Meditation can have adverse effects that are rarely discussed
- Certain practices are better or worse suited for specific conditions
- Overlaps between meditation effects and psychedelic experiences
- Who is most vulnerable to negative meditation effects
- How to mitigate risks while maintaining benefits
- Trauma-informed approaches to contemplative practice
Key Moments
Cheetah House founder suppressed her own data: meditation increased wakefulness with a 0.8 correlation
Britton's early research found meditation increased wakefulness with a stunning 0.8 correlation to practice amount -- but she didn't publish it because she was an evangelist for meditation. A wake-up call on retreat led her to found Cheetah House, a nonprofit supporting meditators in distress. Ferriss shares his own adverse experience combining fasting and psilocybin microdosing at a silent retreat.
"The correlation with the amount of practice was 0.8. And this is my first confession: I didn't publish the data."
1 in 10 meditators report adverse effects: trauma history is a risk factor but doesn't guarantee safety
Britton's epidemiological study found about 1 in 10 meditators experience adverse effects. Risk factors include trauma history, psychiatric history, and being a high achiever -- 75% of those with problems had graduate degrees. She recommends titrating dose (start with afternoon retreats, not 10-day intensives) and argues against screening people out in favor of better monitoring and off-ramps.
"75% had graduate degrees, MDs, PhDs, JDs. These were CEOs. Being a high achiever is a risk factor."
Know your indicator lights: teach meditators their personal warning signs before things escalate
Instead of screening people out, Britton trains each person to recognize their own window of tolerance. Half of trauma survivors find breath-based meditation anxiety-inducing, so Cheetah House lets clients pick their own meditation object. The key insight: trauma destroys agency, so any system that dictates practice can re-traumatize.
"Trauma is associated with powerlessness and a lack of options. Any kind of system is also a form of ideological power over them."
Small dose, high frequency: Britton's personal practice is brief twice-daily meditation plus 4-5x more movement
After her own adverse experiences, Britton now practices brief meditation twice daily and spends 4-5 times more time on movement. She built an off-grid cabin in Vermont as her resource. She emphasizes that adverse events also happen in psychotherapy -- about 10% of patients get worse -- but nobody talks about it.
"Small dose, high frequency. The meditation's great, but I spend four to five times as much time moving every day."
Billion-dollar meditation companies will produce millions of adverse events: the Dalai Lama was dismissive
With startups worth billions promoting mindfulness and psychedelics to millions, adverse events are inevitable at scale. Britton presented her research to the Dalai Lama, who was dismissive and laughing -- saying it happened because people lacked Buddhist training. Named meditation teachers in their study likely had the same problems.
"You have companies worth billions of dollars promoting mindfulness. We are going to see adverse events."
