Meditation is now sold as a cure-all: for stress, insomnia and high blood pressure, for a "younger brain" and even longer telomeres. The research paints a more sober but still respectable picture. For a few questions the evidence is good; for many, effects are small; for some promises, there is almost nothing. Side effects occur, too.
What "meditation" means
Mindfulness meditation trains attention on the present moment – breath, body, thoughts – without judging it. The best-known programme is MBSR (Mindfulness-Based Stress Reduction), developed by Jon Kabat-Zinn in the US in the late 1970s: eight weeks, one group session a week, daily practice at home. MBCT (Mindfulness-Based Cognitive Therapy) combines this format with elements of cognitive behavioural therapy and is aimed at people who have had several episodes of depression. Add mantra techniques such as Transcendental Meditation, breathing exercises and apps – and a result for MBCT does not automatically apply to an app.
What the studies show
Anxiety, depression, stress: small to moderate effects
The most influential review (Goyal et al., JAMA Internal Medicine, 2014), prepared for the US Agency for Healthcare Research and Quality (AHRQ), analysed 47 randomised trials with 3,515 participants. For mindfulness programmes it found moderate evidence of less anxiety (effect size 0.38 at eight weeks, 0.22 at three to six months), fewer depressive symptoms (0.30 and 0.23) and less pain (0.33). For stress the evidence was low. The authors judged these small effects comparable with what an antidepressant achieves in a primary care population – without its side effects. But meditation was never better than another active treatment.
A trial by Hoge et al. (JAMA Psychiatry, online 2022) compared MBSR with the antidepressant escitalopram in 276 adults with anxiety disorders. MBSR was non-inferior. Ten people stopped the tablets because of side effects; none did so in the MBSR group. Limitations: a single trial, no placebo, and about a quarter did not complete it. Still, a serious option for someone who would rather start without medication.
Preventing depressive relapse: the strongest finding
MBCT is best supported for people with recurrent depression who are currently well. An individual patient data meta-analysis of randomised trials (Kuyken et al., JAMA Psychiatry, 2016; 1,258 patients) showed a 31% lower risk of relapse over 60 weeks compared with no MBCT (hazard ratio 0.69). Against active treatments such as continued antidepressants, the risk was also lower (hazard ratio 0.79).
Germany's National Disease Management Guideline on unipolar depression (NVL, version 3.2, 2022) explicitly recommends longer-term psychotherapy to prevent relapse for people at increased risk (strong recommendation). Its evidence summary lists MBCT among effective methods at twelve months, without a separate recommendation naming it.
Pain, sleep, burnout
Effects on chronic pain are small. For sleep, the AHRQ review found insufficient evidence (on why sleep matters, see Sleep: the risk factor your doctor rarely asks about). Among physicians, a meta-analysis of 25 studies with 925 participants found that mindfulness programmes reduced burnout slightly and stress somewhat more – but the quality of the evidence was low to very low.
A counterpoint: mindfulness in schools
The British MYRIAD trial (Evidence-Based Mental Health, 2022) enrolled 84 schools and 8,376 adolescents aged 11 to 13. One year after mindfulness training there was no difference from usual school teaching in risk of depression, behaviour or well-being. A follow-up analysis even found slightly worse scores among pupils who were already at risk. What helps volunteers in a course does not necessarily work when prescribed to whole groups.
Blood pressure and the heart
In 2017 the American Heart Association judged the evidence on meditation and cardiovascular risk to be modest in quality and quantity. It sees a possible benefit, as a low-cost, low-risk adjunct to – not a replacement for – guideline-based prevention. A meta-analysis of Transcendental Meditation (12 studies, 996 participants) found on average about 4 mmHg lower systolic and 2 mmHg lower diastolic blood pressure, with clear methodological weaknesses. On slow breathing, see Vagus nerve stimulation: therapy, gadget or myth?; on stress hormones, Cortisol, fact-checked.
Brain and telomeres: beware of big claims
Early imaging studies reported more grey matter after MBSR. When two randomised trials with 218 participants tested this against a waiting list and an equally demanding control programme, they found no structural changes. For telomeres, the protective "caps" on chromosomes, a meta-analysis of 25 studies found that the effect rested mainly on comparisons of long-term meditators with non-meditators, with signs of publication bias. That meditation slows ageing or protects against dementia has not been shown (on dementia prevention, see Preventing dementia).
Meditation apps
A meta-analysis of 34 randomised trials (7,566 participants) found small to moderate improvements with mindfulness apps in stress (effect size 0.46), anxiety (0.28) and depressive symptoms (0.33), with an unclear risk of bias. The bigger problem is persistence: in real-world usage data, only 4.7% of those who installed a meditation app still used it after 30 days.
Side effects do occur
Meditation is not always harmless
A systematic review (Farias et al., 2020; 83 studies, 6,703 meditators) found adverse effects in 8.3% – about 83 in 1,000. In controlled trials the figure was 3.7%, in observational studies 33.2%. Most common were anxiety, low mood and perceptual oddities – also in people without prior mental illness. In a detailed interview study after MBCT courses, 37% reported a negative impact on functioning and 6 to 14% lasting negative effects, often hyperarousal or a sense of unreality (depersonalisation) – rates similar to other psychological treatments. Anyone who has experienced psychosis or severe trauma should talk to their clinician before an intensive course and choose trauma-sensitive teaching; long silent retreats are not a starting point.
Courses and health insurers in Germany
Germany's statutory health insurers (GKV) subsidise certified prevention courses under § 20 of Social Code Book V. The basis is the GKV umbrella association's prevention guideline (Leitfaden Prävention, current version of 17 December 2025); one of its fields of action is "stress and resource management", covering stress-coping programmes and relaxation. A central body, the Zentrale Prüfstelle Prävention, certifies courses. Some MBSR courses are offered with an insurer subsidy. Reimbursement varies by insurer – ask before signing up. With recurrent depression, ask your psychotherapist specifically about MBCT.
What this means for you
- Start small: 5 to 10 minutes a day, for example in the morning, is a realistic start.
- Course or app? A guided eight-week course offers structure, a teacher to ask and a group and helps you keep going. Apps are cheap but usually abandoned quickly.
- Realistic expectations: Expect somewhat more calm and less rumination, not a transformation. If unpleasant feelings grow, shorten sessions, keep your eyes open or switch to movement.
- When it is more than stress: Persistent low mood, loss of drive or suicidal thoughts call for medical or psychotherapeutic help – meditation does not replace treatment for depression. See also Stress, cortisol, and the high achiever's paradox and Loneliness.
Bottom line
Meditation is no miracle cure, nor hocus-pocus. The best evidence is for MBCT to prevent relapse in recurrent depression. Mindfulness courses measurably reduce anxiety, stress and depressive symptoms, although usually by a small amount. For blood pressure, brain structure and "anti-ageing" the evidence is weak. Start with a few minutes a day or an eight-week course – and know that unpleasant effects can occur.
Evidence: ★★★ High for MBCT to prevent relapse in recurrent depression; ★★ Moderate for reducing anxiety and stress; ★ Emerging for blood pressure, brain changes and longevity.
References
- Goyal M, Singh S, Sibinga EM, et al. Meditation programs for psychological stress and well-being: a systematic review and meta-analysis. JAMA Intern Med. 2014;174(3):357-368. doi:10.1001/jamainternmed.2013.13018 Open article (DOI) ↗
- Kuyken W, Warren FC, Taylor RS, et al. Efficacy of mindfulness-based cognitive therapy in prevention of depressive relapse: an individual patient data meta-analysis from randomized trials. JAMA Psychiatry. 2016;73(6):565-574. doi:10.1001/jamapsychiatry.2016.0076 Open article (DOI) ↗
- Bundesärztekammer (BÄK), Kassenärztliche Bundesvereinigung (KBV), Arbeitsgemeinschaft der Wissenschaftlichen Medizinischen Fachgesellschaften (AWMF). Nationale VersorgungsLeitlinie Unipolare Depression – Version 3.2. 2022. Kapitel 6: Erhaltungstherapie und Rezidivprophylaxe.
- Hoge EA, Bui E, Mete M, Dutton MA, Baker AW, Simon NM. Mindfulness-based stress reduction vs escitalopram for the treatment of adults with anxiety disorders: a randomized clinical trial. JAMA Psychiatry. 2023;80(1):13-21. doi:10.1001/jamapsychiatry.2022.3679 Open article (DOI) ↗
- Levine GN, Lange RA, Bairey-Merz CN, et al. Meditation and cardiovascular risk reduction: a scientific statement from the American Heart Association. J Am Heart Assoc. 2017;6(10):e002218. doi:10.1161/JAHA.117.002218. Bai Z, Chang J, Chen C, Li P, Yang K, Chi I. Investigating the effect of transcendental meditation on blood pressure: a systematic review and meta-analysis. J Hum Hypertens. 2015;29(11):653-662. doi:10.1038/jhh.2015.6 Open article (DOI) ↗
- Fendel JC, Bürkle JJ, Göritz AS. Mindfulness-based interventions to reduce burnout and stress in physicians: a systematic review and meta-analysis. Acad Med. 2021;96(5):751-764. doi:10.1097/ACM.0000000000003936 Open article (DOI) ↗
- Kuyken W, Ball S, Crane C, et al. Effectiveness and cost-effectiveness of universal school-based mindfulness training compared with normal school provision in reducing risk of mental health problems and promoting well-being in adolescence: the MYRIAD cluster randomised controlled trial. Evid Based Ment Health. 2022;25(3):99-109. doi:10.1136/ebmental-2021-300396. Montero-Marin J, Allwood M, Ball S, et al. School-based mindfulness training in early adolescence: what works, for whom and how in the MYRIAD trial? Evid Based Ment Health. 2022;25(3):117-124. doi:10.1136/ebmental-2022-300439 Open article (DOI) ↗
- Kral TRA, Davis K, Korponay C, et al. Absence of structural brain changes from mindfulness-based stress reduction: two combined randomized controlled trials. Sci Adv. 2022;8(20):eabk3316. doi:10.1126/sciadv.abk3316. Bossert L, Arzberger K, Dorok F, et al. The effects of mindfulness-based interventions on telomere length and telomerase activity: a systematic review and meta-analysis. Mindfulness. 2023;14:495-509. doi:10.1007/s12671-023-02075-x Open article (DOI) ↗
- Gál É, Ștefan S, Cristea IA. The efficacy of mindfulness meditation apps in enhancing users' well-being and mental health related outcomes: a meta-analysis of randomized controlled trials. J Affect Disord. 2021;279:131-142. doi:10.1016/j.jad.2020.09.134. Baumel A, Muench F, Edan S, Kane JM. Objective user engagement with mental health apps: systematic search and panel-based usage analysis. J Med Internet Res. 2019;21(9):e14567. doi:10.2196/14567 Open article (DOI) ↗
- Farias M, Maraldi E, Wallenkampf KC, Lucchetti G. Adverse events in meditation practices and meditation-based therapies: a systematic review. Acta Psychiatr Scand. 2020;142(5):374-393. doi:10.1111/acps.13225. Britton WB, Lindahl JR, Cooper DJ, Canby NK, Palitsky R. Defining and measuring meditation-related adverse effects in mindfulness-based programs. Clin Psychol Sci. 2021;9(6):1185-1204. doi:10.1177/2167702621996340 Open article (DOI) ↗
Head of Liver Surgery and Transplantation at LMU University Hospital Munich. Edits this independent blog in a private capacity; views are his own. About →
This article is general information and not individual medical advice. Decisions about tests and treatment belong in a conversation with your own physician.