Is Meditation good for mood & stress?

The evidence points that way, though it's not yet conclusive. A 2014 JAMA Internal Medicine meta-analysis of meditation programs found moderate evidence for improvements in stress, anxiety and depression symptoms, with effect sizes generally small-to-moderate — a conclusion echoed by later meta-analyses of blood pressure outcomes and brain morphometry. That's reflected in an evidence score of 65/100 for its role in mood & stress, drawn from 10 studies (2 RCTs), with an estimated impact on longevity rated moderate (45/100).