A growing body of scientific research is challenging the widespread assumption that meditation is universally beneficial and free of side effects. Recent studies have found that nearly 60% of meditators experience some form of unexpected adverse reaction during or after practice, and approximately one-third find these effects significantly distressing. For a wellness community that has long promoted meditation as a risk-free intervention for everything from anxiety to chronic pain, these findings demand a more nuanced conversation about safety, preparation, and individual variation.
The research, published across several peer-reviewed journals including Acta Psychiatrica Scandinavica and PLOS ONE, does not suggest that meditation is harmful for most people. Rather, it reveals that the practice produces a wider range of experiences than the popular narrative acknowledges — and that certain individuals may be more vulnerable to difficult reactions than others. Understanding these risks does not diminish meditation’s value; it strengthens our ability to practice and teach it responsibly.
What the Research Actually Found
The headline statistic — that 58% of meditators reported at least one adverse effect — comes from a systematic review of multiple studies involving thousands of participants across various meditation traditions. The most commonly reported effects include heightened anxiety, depersonalization (feeling disconnected from oneself), derealization (the environment feeling unreal), emotional flooding, and sleep disturbances.
Importantly, the severity varied enormously. For many participants, the effects were mild and transient — a brief period of emotional intensity during a retreat, or temporary difficulty sleeping after an evening session. For approximately 33% of those reporting effects, however, the experiences were distressing enough to interfere with daily functioning, and a smaller subset required professional support to process what had emerged during practice.
The research identified several risk factors that correlated with more intense adverse effects. Longer meditation sessions, intensive retreat formats, a history of trauma, and pre-existing mental health conditions all increased the likelihood of difficult experiences. The study noted that silent retreats involving many hours of daily practice posed the highest risk, likely because the combination of prolonged introspection and reduced sensory stimulation can destabilize psychological defenses that ordinarily remain intact during shorter daily sessions.
Why This Matters for the Yoga Community
The yoga world has a particularly important relationship with these findings because meditation is integral to most yoga traditions. Dhyana (meditation) is one of the eight limbs of Patanjali’s yoga system, and many yoga classes incorporate guided meditation or extended Shavasana practices that involve meditation-adjacent states. A growing movement to integrate yoga into healthcare settings makes informed consent about meditation’s potential effects more important than ever.
The findings also have direct implications for the booming digital meditation market, where apps and online platforms deliver meditation instruction to millions of people without the personalized guidance a teacher would provide in person. When a practitioner using a meditation app experiences depersonalization for the first time, they may have no framework for understanding what is happening or whether it is cause for concern.
Yoga teachers who include meditation in their classes should be aware that some students may be experiencing these effects without reporting them. Creating an environment where students feel comfortable describing unusual experiences — without shame or dismissal — is a crucial part of trauma-informed teaching practice.
How to Practice Meditation Safely
The research does not suggest that people should avoid meditation. The benefits of regular practice — reduced anxiety, improved focus, lower blood pressure, enhanced emotional regulation — remain well-supported by decades of research. What the findings do suggest is that a more informed, gradual approach serves practitioners better than diving into intensive practice without preparation.
Start with shorter sessions. If you are new to meditation, beginning with five to ten minutes daily and increasing gradually over weeks or months allows your nervous system to adapt to the practice. This mirrors the progressive approach used in yoga for anxiety, where gentle exposure to stillness builds tolerance over time rather than overwhelming the system.
Choose techniques appropriate to your current mental state. Focused attention practices like breath counting or mantra repetition tend to produce fewer adverse effects than open monitoring techniques, where practitioners observe whatever arises without directing attention. If you are going through a period of high stress, grief, or emotional instability, focused practices provide a stabilizing anchor that open awareness practices may not.
If you have a history of trauma, consider working with a meditation teacher who has specific training in trauma-informed practice before attending intensive retreats. The combination of prolonged silence, reduced sleep, and deep introspection that characterizes many meditation retreats can reactivate traumatic memories in ways that feel uncontrollable without proper support.Know when to stop. If you experience persistent depersonalization, intense anxiety that does not resolve after a session, or intrusive thoughts that worsen with practice, these are signals to pause and consult a mental health professional. Meditation is a powerful tool, and like any powerful tool, it requires respect for its effects and honest self-assessment about readiness.
What Teachers Should Know
Yoga and meditation teachers have a responsibility to provide honest, balanced guidance about meditation’s range of effects. This means moving beyond the marketing language of unconditional benefit and acknowledging that meditation can sometimes be challenging in ways that go beyond simple restlessness or boredom. Including a brief verbal disclaimer at the start of guided meditations — something as simple as acknowledging that strong emotions or unusual sensations may arise and that stopping is always an option — normalizes these experiences and empowers students to self-regulate.
Teachers should also develop referral relationships with mental health professionals who understand contemplative practices, so that when a student reports a difficult experience, the teacher can provide appropriate support beyond their scope of practice. The intersection of yoga and therapeutic care is a growing field, and teachers who bridge these worlds serve their students most effectively.
Key Takeaways
Research shows that nearly 60% of meditators experience some form of adverse effect, with about one-third finding them distressing. Risk factors include intensive retreat formats, long sessions, trauma history, and pre-existing mental health conditions. Meditation remains beneficial for most people, but a gradual, informed approach is safer than diving into intensive practice. Start with short sessions, choose focused attention techniques over open monitoring when stressed, and know when to pause and seek professional support. Teachers should provide honest disclaimers and develop referral relationships with mental health professionals.
