Mindfulness has a growing evidence base, particularly for depression, anxiety, and stress, though the strongest findings come from structured mindfulness-based programs rather than from informal in-session noticing on its own. Reviews of randomized trials suggest these programs often outperform waitlists, look more modest against other active treatments, and can look similar to established therapies for some problems. Mindfulness-based cognitive therapy, a close cousin of the skill used in weekly therapy, has particularly clear findings for people trying to stay well after repeated depression. That still matters for this work. It is a foundation, not a promise that sitting quietly will lift every kind of distress, and it does not replace trauma processing or medical care when those are what the situation requires.
Goldberg, S. B., et al. (2018), Clinical Psychology Review. A meta-analysis of mindfulness-based interventions across psychiatric populations found they were associated with moderate benefits compared with no treatment, smaller benefits compared with other active controls, and similar outcomes to established evidence-based treatments, with the most consistent support for depression, pain, smoking, and addictive disorders.
Kuyken, W., et al. (2016), JAMA Psychiatry. An individual-patient-data meta-analysis of randomized trials found that mindfulness-based cognitive therapy was associated with a lower risk of depressive relapse over 60 weeks than comparison conditions, especially for people with more residual symptoms.
Goldberg, S. B., Riordan, K. M., Sun, S., & Davidson, R. J. (2022), Perspectives on Psychological Science. A review of 44 meta-analyses of randomized trials found mindfulness-based programs were generally superior to passive controls, with smaller and less consistent advantages against active controls, and noted that reporting of adverse effects was inconsistent.