Benefits of Meditation: 12 Science-Based Facts, Checked

The best-supported benefits of meditation are modest drops in anxiety, depression, stress and pain. A 2014 review of 47 trials in JAMA Internal Medicine found that eight-week mindfulness programs improved all four by a small to moderate amount. Many other popular claims, from a bigger brain to a healthier heart, rest on small or single studies and are still being tested.

Below are the 12 findings this article has cited since 2018, each checked again: what the study did, what it found and how far you can take it.

What counts as meditation

In the yoga tradition, meditation is dhyana (ध्यान), the seventh of the eight limbs of yoga. The Sanskrit root dhyai means to think of, to contemplate. Patanjali places it after dharana, holding attention on one point, and before samadhi, absorption.

Most modern research looks at a handful of techniques:

• Focused attention: you rest your attention on one thing, usually the breath, and bring it back each time it drifts.
• Open monitoring: you notice whatever comes up, sounds, thoughts, sensations, without following it.
• Mindfulness programs such as MBSR (Mindfulness-Based Stress Reduction) and MBCT (Mindfulness-Based Cognitive Therapy): eight weekly group sessions plus home practice.
• Loving-kindness (metta): you repeat phrases of goodwill toward yourself and others.
• Transcendental Meditation (TM): a silent mantra, 20 minutes twice a day.

The type matters. A result from a TM trial says little about a five-minute breathing app, and the reverse.

12 benefits of meditation and what the studies show

1. Fewer symptoms of depression

In Belgium, researchers ran a mindfulness program in five secondary schools with about 400 students aged 13-20 (Raes and colleagues, 2014). Six months later the students who took part reported fewer depressive symptoms than the control group. For adults with recurring depression, MBCT has the strongest record: pooled trials show it lowers the risk of relapse, and in the UK it is a recommended option for people who have had several episodes.

2. Less anxiety

The JAMA review (Goyal and colleagues, 2014) found moderate evidence that mindfulness programs reduce anxiety. The effect was small to moderate, roughly the size seen with antidepressants in primary care. That comparison is often quoted as "as effective as medication". The review did not test meditation against drugs head to head, and it found no evidence that meditation beat other active treatments such as exercise or therapy.

3. Lower stress, in body and mind

A 2017 meta-analysis of 45 studies (Pascoe and colleagues) found that meditation lowered cortisol, the main stress hormone, along with blood pressure and heart rate. The mechanism is plausible: slow, attentive breathing with long exhales shifts the nervous system toward rest. The changes are measurable, and they are modest.

4. Changes in brain structure, possibly

A Harvard team at Massachusetts General Hospital scanned 16 people before and after an eight-week MBSR course (Hölzel and colleagues, 2011). They reported more grey matter in the hippocampus, linked to learning and memory, and in areas tied to emotion regulation and sense of self. It is one of the most shared meditation studies. It is also small. A 2022 trial at the University of Wisconsin with more than 200 participants found no structural brain changes after the same eight-week program.

5. Steadier attention

Katherine MacLean and colleagues at the University of California, Davis, followed people on a three-month meditation retreat (2010). Their ability to notice small differences and to stay alert during a long, dull task improved. Shorter training shows smaller effects: in one study, four 20-minute sessions improved students' scores on attention tests. The old version of this article said meditators did "ten times better". We could not find a study that supports that number, so it is gone.

6. Lower pain sensitivity

At the University of Montreal, Joshua Grant and Pierre Rainville put heat on the calves of Zen meditators and non-meditators (2009). The meditators tolerated more heat, and their brain activity in pain areas was lower. The Zen group was 13 people with years of practice, so the result says more about long-term practitioners than about beginners.

7. Pain relief after four short sessions

At Wake Forest, Fadel Zeidan taught 15 healthy beginners breath-focused meditation in four 20-minute classes (2011). In the scanner, with heat on the skin, they rated pain intensity about 40% lower and pain unpleasantness about 57% lower. The popular headline said meditation beats morphine. The authors compared their numbers with typical results from painkiller studies, which is a comparison across studies, not a trial. Nobody in the study took morphine.

8. Help with adult ADHD

Small trials of MBCT in adults with ADHD report fewer symptoms, less impulsivity and a better ability to act with awareness. A Dutch trial with 120 adults found a moderate improvement over usual care. The evidence is early. Meditation sits next to standard treatment here, not in its place.

9. More creative thinking

At Leiden University, Lorenza Colzato's group tested two styles (2012). After open monitoring meditation, people came up with more ideas in a divergent thinking task. Focused attention meditation did not have that effect. A useful detail: the style of practice changes what it trains.

10. A lower risk of heart attack and stroke, in one trial

In 2012, Robert Schneider and colleagues followed 201 African American adults with coronary heart disease for about five years. Those taught Transcendental Meditation had 48% fewer heart attacks, strokes and deaths than a health education group. It is a single trial, run by researchers linked to TM, and its publication was delayed while the data were reviewed. The American Heart Association's statement from 2017 calls meditation a reasonable addition to heart care, based mostly on small effects on blood pressure. It does not treat the 48% as settled.

11. Changes in stress-related genes

Researchers from the University of Wisconsin-Madison with teams in Spain and France compared experienced meditators with non-meditators over one day (Kaliman and colleagues, 2014). After eight hours of mindfulness practice, the meditators showed lower activity in genes linked to inflammation and a faster cortisol recovery after a stress test. It was one day and 40 people. An interesting signal, not a treatment.

12. A possible buffer for people with HIV

At UCLA, David Creswell's team gave an eight-week MBSR course to adults with HIV (2009). Their CD4 T cells, the cells HIV destroys, stayed stable, while the control group's counts fell. The study had 48 participants and many dropped out. It does not show that meditation treats HIV. It suggests that stress plays a part in how the disease moves, and that lowering stress may help alongside medication.

Try this 10-minute guided meditation with Guy Powiecki.

Where the research disagrees

Meditation research has grown from a few hundred papers to thousands. More studies has not meant clearer answers. Four points come up again and again.

• Small studies, big headlines. The brain, morphine and HIV findings above all come from groups of 15-50 people. Larger trials often find smaller effects, or none, as with the grey matter result.
• What is it compared with? Meditation beats a waiting list. Against another active option, such as exercise, relaxation training or therapy, it usually performs about the same. Part of the effect may come from setting aside quiet time, the group and the teacher.
• Who runs the study. Many trials are run by teachers or organisations who believe in the method. That does not make them wrong. It is a reason to wait for independent replication.
• Meditation is not always calm. A 2020 review (Farias and colleagues) found that about 8% of people who meditate report an unwanted effect, most often anxiety or low mood. Long, silent retreats carry more risk than ten minutes at home.

What we can say with confidence: regular practice helps many people feel less anxious and stressed, it can ease how pain feels, and it is a well-tested way to prevent a return of depression. The rest is promising and unproven.

How to start meditating

1. Sit on a cushion or a chair with your spine upright and your hands resting on your thighs.
2. Set a timer for five or ten minutes. Most studies use 10-45 minutes a day, but short, regular sessions are easier to keep.
3. Close your eyes or lower your gaze. Feel the breath at the nostrils or the belly.
4. When you notice that your mind has wandered, name it, "thinking", and come back to the breath. That return is the practice.
5. Let the exhale be a little longer than the inhale. Four counts in, six counts out, if counting helps.

Our beginner's guide to meditation goes through posture and technique in more detail. If your mind races, meditation for a restless mind gives you something to hold on to. If sitting still feels impossible, start with the breath: Nadi Shodhana, alternate nostril breathing, and the techniques in breathing skills for anxiety and stress slow you down before you sit.

Lying down works too. Yoga Nidra is a guided practice done flat on your back, and loving-kindness meditation is a good choice if you are hard on yourself; our post on meditation for self-love explains how it works.

Who should be careful

• People with a history of trauma, psychosis or severe depression. Long periods of inward attention can bring up difficult material. Practise with a teacher who knows your history, keep sessions short and keep your eyes open if that feels safer.
• Anyone in treatment. Meditation can sit next to medication and therapy. Do not stop either without talking to your doctor.
• Retreat beginners. Build up at home before a multi-day silent retreat.

For the movement side of the practice, our guide to the health benefits of yoga covers what a regular class does for the body.

To build the habit, the 21-day meditation challenge gives you one short guided session a day, and all our guided classes are collected under meditation.

Frequently asked questions

What are the main benefits of meditation?

The best-documented benefits are less anxiety, less stress, lower pain intensity and a lower risk of depression coming back. Reviews of dozens of trials show small to moderate effects. Claims about brain growth, heart disease and genes rest on smaller studies and are not settled.

What happens if you meditate daily?

In most eight-week programs, people who practise daily report less stress and anxiety and find it easier to notice when their attention drifts. Measures such as cortisol and blood pressure often drop a little. The effects build with regular practice and fade when you stop.

How long do you need to meditate to see benefits?

Studies of beginners show changes in pain ratings and attention after four 20-minute sessions. Most mental health results come from eight-week programs with 20-45 minutes of practice a day. Ten minutes every day is a realistic start and easier to keep than one long session a week.

How can I calm an overactive brain?

Give your attention one thing to rest on. Sit, feel the breath and make the exhale longer than the inhale, for example four counts in and six out. When thoughts pull you away, notice it and come back. Guided meditation or Yoga Nidra help when silence feels too loud.

Is meditation better than medication for anxiety or depression?

The research does not show that. Mindfulness programs reduce symptoms by about as much as antidepressants do in some primary care studies, but they have rarely been tested head to head. Meditation works well next to treatment. Talk to your doctor before you change any medication.

Can meditation have side effects?

Yes. A 2020 review found that about 8% of meditators report unwanted effects, most often anxiety, low mood or disturbing memories. The risk is higher with long, intensive retreats and for people with a history of trauma or psychosis. Short sessions and a good teacher lower it.

Which type of meditation is best for beginners?

Breath-focused meditation is the easiest to learn and the most studied. You sit, follow the breath and return to it when your mind wanders. Guided sessions, walking meditation and loving-kindness practice are good alternatives if sitting in silence feels hard.