This review evaluates the effectiveness of interventions aimed at preventing childhood obesity through diet, physical activity, and lifestyle changes. It includes 22 studies, with ten long-term (at least 12 months) and twelve short-term (12 weeks to 12 months) interventions. Most studies were school-based, targeting children under 18 years old across various regions. The review found that while some interventions showed small positive effects on BMI, the overall evidence was inconclusive due to heterogeneity in study design, quality, and outcomes. No single intervention was proven effective in preventing obesity. The review highlights the need for more comprehensive strategies that include dietary and physical activity changes, social support, and environmental factors. It also notes the importance of long-term follow-up and the need for more research on cost-effectiveness and broader population-level interventions. The review concludes that while some interventions may improve diet and physical activity, their impact on BMI remains limited, and further research is needed to develop effective obesity prevention strategies for children.This review evaluates the effectiveness of interventions aimed at preventing childhood obesity through diet, physical activity, and lifestyle changes. It includes 22 studies, with ten long-term (at least 12 months) and twelve short-term (12 weeks to 12 months) interventions. Most studies were school-based, targeting children under 18 years old across various regions. The review found that while some interventions showed small positive effects on BMI, the overall evidence was inconclusive due to heterogeneity in study design, quality, and outcomes. No single intervention was proven effective in preventing obesity. The review highlights the need for more comprehensive strategies that include dietary and physical activity changes, social support, and environmental factors. It also notes the importance of long-term follow-up and the need for more research on cost-effectiveness and broader population-level interventions. The review concludes that while some interventions may improve diet and physical activity, their impact on BMI remains limited, and further research is needed to develop effective obesity prevention strategies for children.