What are the benefits of daily meditation?

The largest review of meditation programs to date is a 2014 meta-analysis led by Madhav Goyal at Johns Hopkins, published in JAMA Internal Medicine. It pooled 47 randomized trials with roughly 3,500 participants and found moderate evidence of improved anxiety, depression, and pain, with smaller effects on stress and mental-health–related quality of life. The headline: about 30 minutes of daily practice produced small-to-moderate improvements on psychological distress scales.

The honest caveat the authors flagged is that the effect sizes are modest — comparable to first-line antidepressants for depression in some trials, but not a replacement for clinical care. Improvements show up more reliably for anxiety and stress than for attention or substance use. Trials also leaned on standardized programs (mostly MBSR), so the evidence doesn’t transfer perfectly to whatever someone happens to do on a meditation app.

Daily practice matters more than duration. Brief, regular sessions (10–20 minutes) tend to track with better outcomes than occasional long ones, mostly because the benefit depends on retraining attention, which only happens with repetition.