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目的评价不同食物能量换算系统在我国日常膳食能量估算上的一致性。方法:通过人体试食试验测定低纤膳食、普通膳食、低燕麦DF,高燕麦DF、低玉米DF和高玉米DF膳食的食物燃烧能、总粪能、总尿能、产能营养素和DF含量,分析测定的代谢能与不同食物能量换算系统计算的能量值之间的差异。结果:总体上各能量换算系统的能量值之间存在差异,与测定的代谢能相比,阿特氏通用系数系统高估了4%,我国采用的系统低估了3.4%,净代谢能系统低估了6%,改进的代谢能系统和Livesey以总能为基础的经验公式较接近测定的代谢能。结论:膳食纤维是造成各能量系统之间存在差异的重要原因,中国应用的能量换算系统低估了能量值。
Objective To evaluate the consistency of different dietary energy conversion systems in estimating daily dietary energy in China. Methods: The food combustion energy, total fecal energy, total urinary energy, yield nutrients and DF content of low fiber diet, ordinary diet, low oats DF, high oats DF, low corn DF and high corn DF were determined by human feeding test. The difference between the measured metabolic energy and the calculated energy values of different food energy conversion systems is analyzed. Results: In general, there is a difference between the energy values of each energy conversion system, which is an overestimation of 4% for Attel’s universal coefficient system, 3.4% for our system, and an underestimate of the net metabolic energy system By 6%, the improved metabolic energy system and Livesey’s total energy-based empirical formula are closer to the measured metabolic energy. CONCLUSIONS: Dietary fiber is an important contributor to differences in energy systems, and energy conversion systems applied in China underestimated energy values.