Medium- versus long-chain triglycerides for 27 days increases fat oxidation and energy expenditure without resulting in changes in body composition in overweight women

超重 脂肪组织 作文(语言) 内科学 交叉研究 内分泌学 动物科学 化学 减肥 医学 肥胖 食品科学 生物 病理 哲学 替代医学 语言学 安慰剂
作者
Marie‐Pierre St‐Onge,Christine Bourque,Peter J.H. Jones,Robert Ross,William D. Parsons
出处
期刊:International Journal of Obesity [Springer Nature]
卷期号:27 (1): 95-102 被引量:122
标识
DOI:10.1038/sj.ijo.0802169
摘要

OBJECTIVE: To determine the effects of long-term consumption of medium chain (MCT) versus long chain triglycerides (LCT) on energy expenditure (EE), substrate oxidation and body composition. HYPOTHESIS: MCT consumption will not result in greater EE, substrate oxidation, and body weight loss compared with LCT consumption. RESEARCH METHODS AND PROCEDURES: Seventeen healthy obese women participated in this randomized, crossover inpatient trial. Meals were prepared and consumed on site for two periods of 27 days. Diets containing 40% of energy as fat, with treatment fat comprising 75% of the total fat, were designed to supply each subject with their individual weight-maintaining energy needs. The MCT diet contained 67% of treatment fat as MCT oil (49% octanoate, 50% decanoate) whereas the LCT diet contained exclusively beef tallow as treatment fat. Body composition was assessed by magnetic resonance imaging (MRI) on day 1 and 28 of each phase while energy expenditure was measured on day 2 and 27. RESULTS: Changes in total and subcutaneous adipose tissue volumes following consumption of MCT and LCT were not different (−0.61±0.38 l vs −0.54±0.48 l and −0.58±0.35 l vs −0.48±0.40 l, respectively). Average EE and fat oxidation were greater (P<0.05) during MCT than LCT consumption (0.95±0.019 vs 0.90±0.024 kcal/min, respectively, for EE and 0.080±0.0026 vs 0.075±0.0022 g/min, respectively for fat oxidation). DISCUSSION: These results show that long-term consumption of MCT enhances EE and fat oxidation in obese women, when compared to LCT consumption. The difference in body composition change between MCT and LCT consumption, although not statistically different, was consistent with differences predicted by the shifts in EE. It can be concluded that substitution of MCT for LCT in a targeted energy balance diet may prevent long-term weight gain via increased EE.
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