The aim of this study was to conduct a comprehensive quantitative synthesis of the effects of 2 mindfulness training interventions on weight-loss and health behaviors in adults with 3 overweight and obesity using meta-analytic techniques. Studies included in the analysis (n = 4 12) were randomized controlled trials investigating the effects of any form of mindfulness 5 training on weight loss, impulsive eating, binge eating, or physical activity participation in 6 adults with overweight and obesity. Random effects meta-analysis revealed that mindfulness 7 training had no significant effect on weight loss, but an overall negative effect on impulsive 8 eating (d = -1.13) and binge eating (d = -.90), and a positive effect on physical activity levels 9 (d = .42). Meta-regression analysis showed that methodological features of included studies 10 accounted for 100% of statistical heterogeneity of the effects of mindfulness training on 11 weight loss (R 2 = 1,00). Among methodological features, the only significant predictor of 12 weight loss was follow-up distance from post-intervention (b = 1.18; p < .05), suggesting that 13 the longer follow-up distances were associated with greater weight loss. Results suggest that 14 mindfulness training has short-term benefits on health-related behaviors. Future studies 15should explore the effectiveness of mindfulness training on long-term post-intervention 16 weight loss in adults with overweight and obesity. 17 18