The effect of dietary carbohydrate and calorie restriction on weight and metabolic health in overweight/obese individuals: a multi-center randomized controlled trial

作者：Jia Sun, Yuting Ruan, Ningning Xu, Peili Wu, Nie Lin, Kun Yuan, Shengli An, Pei Kang, Shu Li, Qiya Huang, YingZhang, Yuzhong Li, Jialin Su, Wenjun Ma, Bo Chen, Xiuwei Zhang, Xiaoming Chen, Yongqian Liang, Zeyuan Lu, Guobao Deng, Zhen Zhang, Yuqin Wang, Weiheng Wen, Huijie Zhang, Hong Chen · 发表于：BMC Medicine · 年份：2023 · DOI：10.1186/s12916-023-02869-9 · 被引用次数：54 · 研究领域：Diet and metabolism studies、Dietary Effects on Health、Muscle metabolism and nutrition

BACKGROUND: Both low-carbohydrate (LC) and calorie-restricted (CR) diets have been shown to have metabolic benefits. However, the two regimens have yet to be thoroughly compared. We conducted a 12-week randomized trial to compare the effects of these diets separately and in combination on both weight loss and metabolic risk factors in overweight/obese individuals. METHODS: A total of 302 participants were randomized to LC diet (n = 76), CR diet (n = 75), LC + CR diet (n = 76), or normal control (NC) diet (n = 75) using a computer-based random number generator. The primary outcome was the change in body mass index (BMI). The secondary outcomes included body weight, waist circumference, waist-to-hip ratio, body fat, and metabolic risk factors. All participants attended health education sessions during the trial. RESULTS: in LC + CR. LC + CR diet was more effective than LC or CR diet alone at reducing BMI (P = 0.001 and P < 0.001, respectively). Furthermore, compared with the CR diet, the LC + CR diet and LC diet further reduced body weight, waist circumference, and body fat. Serum triglycerides were significantly reduced in the LC + CR diet group compared with the LC or CR diet alone. Plasma glucose, homeostasis model assessment of insulin resistance, and cholesterol concentrations (total, LDL, and HDL) did not change significantly between the groups during the 12-week intervention. CONCLUSIONS: The reduction of carbohydrate intake without restricting caloric intake is more pot...