哈佛大学公共卫生学院(Harvard t . h . Chan School of Public Health)领导的一项新研究显示，主要由植物蛋白和脂肪组成的低碳水化合物饮食与主要由动物蛋白和脂肪组成的低碳水化合物饮食以及精制淀粉等不健康碳水化合物相比，长期体重增加较慢。

　　　FRIDAY, Aug. 17, 2018 -- You've probably heard about the high-carb diet and the low-carb diet, but a new study suggests a moderate-carb diet could be the key to longevity. Researchers followed more than 15,000 people in the United States for a median of 25 years and found that low-carb diets (fewer than 40 percent of calories from carbohyd...