哈佛大学最新研究颠覆认知：低碳水饮食未必能减肥，错误选择或致体重反弹

Core Viewpoint - The recent study from Harvard University reveals that the effectiveness of low-carbohydrate diets (LCDs) for weight loss is highly dependent on food quality rather than merely reducing carbohydrate intake. This challenges the traditional belief that simply cutting carbs leads to weight loss [4][7][11]. Summary by Sections Low-Carbohydrate Diets and Weight Loss - Traditional views suggest that strict carbohydrate restriction is effective for weight loss, but the latest research indicates that not all low-carb diets are beneficial. The quality of the diet is the key determinant of success [4][7]. - A large-scale study involving over 120,000 participants found that low-carb diets based on animal proteins and refined fats had limited weight loss effects and could even lead to rapid weight regain [4][5]. Quality of Food Choices - The study tracked participants for 24 years and found that those who chose plant-based proteins, healthy fats, and whole grains had significantly better weight maintenance compared to those on traditional low-carb diets [5][8]. - Participants who preferred red meat and processed foods in their low-carb diets experienced greater weight gain than those on regular diets, highlighting the importance of food sources and quality in weight management [5][7]. Implications for Weight Management - The findings suggest that for low-carb diets to be effective, individuals should prioritize high-quality plant proteins, unsaturated fats, and low-glycemic carbohydrates instead of simply reducing staple foods [8][11]. - The research emphasizes the need for personalized nutrition strategies, as the effectiveness of plant-based low-carb diets varies based on individual initial body weight, particularly benefiting overweight individuals (BMI 25-30) [9][10]. Conclusion and Future Directions - The study provides a more scientific approach to weight management, indicating that food quality should replace carbohydrate quantity as the new standard for healthy eating [8][11]. - Future research should further explore the impact of plant-based low-carb diets on body composition and metabolic health, considering individual differences in metabolism [10][11].