A series of recent studies is reshaping the understanding of obesity, highlighting that diet, rather than lack of exercise, is the main contributor to rising obesity rates. Findings from Duke University and other research institutions emphasize that high-calorie diets and unhealthy food choices are driving the obesity epidemic across various populations. Despite increased physical activity, many individuals are struggling with weight gain due to their dietary habits. Experts stress the importance of focusing on nutrition to combat obesity, suggesting that improving diet could have a more significant impact on weight loss than exercise alone.