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 significantly influenced by food quality rather than just carbohydrate quantity, challenging traditional beliefs about dieting [5][7][12]. Summary by Sections Low-Carbohydrate Diets and Weight Loss - Traditional views suggest that strict carbohydrate restriction leads to effective weight loss, but new research indicates that not all low-carb diets are beneficial; the quality of food consumed is crucial [5][7]. - A large-scale study involving over 12,000 participants shows that diets high in animal protein and refined fats yield limited weight loss and may even cause weight rebound [5][8]. Importance of Food Quality - The study emphasizes that a high-quality low-carb diet, which includes plant-based proteins, healthy fats, and whole grains, is more effective in maintaining weight than traditional low-carb diets [7][10]. - Those who prefer red meat and processed foods within a low-carb framework tend to experience greater weight gain compared to those on a standard diet, highlighting the importance of food choices [5][8]. Individual Variability in Diet Effectiveness - The effectiveness of plant-based low-carb diets varies based on initial body weight, with overweight individuals (BMI 25-30) benefiting the most from such diets [10][12]. - The research suggests that personalized dietary approaches are essential, as the impact of low-carb diets on weight management is not uniform across different body types [10][12]. Implications for Future Dietary Guidelines - The findings advocate for a shift in dietary recommendations, prioritizing the quality of nutrients over mere carbohydrate reduction, which could lead to healthier weight management strategies [8][12]. - The study's conclusions are expected to influence global dietary guidelines, promoting a more personalized and scientifically-backed approach to nutrition [12][13].