震惊！依靠意志力减肥99%都失败？《柳叶刀》权威警告：全球20亿人体重危机，刻不容缓，减重势在必行！

Core Viewpoint - The article highlights the alarming global obesity crisis, projecting that by 2050, over half of adults (3.8 billion) and one-third of children and adolescents (746 million) will be overweight or obese without immediate policy reforms and actions [6][9]. Global Obesity Status - A comprehensive assessment of overweight and obesity from 1990 to 2021 across 204 countries reveals a dramatic increase in obesity rates, with adult obesity rising from 731 million in 1990 to 2.11 billion in 2021, and childhood obesity increasing from 198 million to 493 million [7]. Global Distribution of Obesity - Eight countries—China (402 million), India (180 million), the USA (172 million), Brazil (88 million), Russia (71 million), Mexico (58 million), Indonesia (52 million), and Egypt (41 million)—account for over half of the global adult overweight or obese population [8]. Future Trends - Projections indicate that by 2050, approximately 60% of adults (3.8 billion) and 31% of children and adolescents (746 million) will face overweight or obesity issues, with the growth rate of childhood obesity expected to surpass that of overweight individuals [9]. Causes of Obesity - The complexity of obesity is emphasized, involving genetic, environmental, and lifestyle factors. Only 1% of obese individuals successfully lose weight through diet and exercise alone [11]. Strategies for Addressing Obesity - The article advocates for a layered intervention approach, suggesting that overweight individuals can manage their weight through diet and exercise, while those with moderate to severe obesity may require medication or surgical options. Public education and policy support are crucial for effective obesity management [13].