How strong is the evidence for Stress Reduction?

Mindfulness-based stress reduction (MBSR) and related mind-body practices are supported by multiple meta-analyses, including one on physiological stress markers and another examining the psychological mechanisms behind MBSR's benefits, plus a randomized controlled trial showing improved sleep and emotion regulation in depressed elderly adults. That evidence is currently rated moderate (68/100), built on 6 published studies, including 2 randomized controlled trials and 3 meta-analyses -- a reasonable base, but not yet enough for full certainty.