Hill J O, DiGirolamo M, Heymsfield S B
Am J Physiol. 1985 Mar;248(3 Pt 1):E370-4. doi: 10.1152/ajpendo.1985.248.3.E370.
We compared, in six subjects, the thermic effect of food (TEF) after the ingestion of a test meal with that observed after the delivery of an equivalent test meal directly into the stomach through a nasogastric tube. TEF was measured after each test meal (i.e., ingested or tube delivered) until postprandial metabolic rate was not different from fasting metabolic rate (as measured at approximately the same time of day on a previous day). TEF after the tube-delivered meal was not significantly different in magnitude or duration from TEF after the ingested meal. The two types of meals also resulted in similar changes in respiratory quotient. These results suggest that the majority of TEF arises after the food reaches the stomach and that very little of TEF is produced by sensory factors or by the mechanical aspects of eating.
我们在六名受试者中，比较了摄入试验餐之后的食物热效应（TEF）与通过鼻胃管将等量试验餐直接送入胃内后所观察到的食物热效应。在每次试验餐（即摄入的或通过管道输送的）之后测量TEF，直到餐后代谢率与空腹代谢率无差异（在前一天大致相同的时间测量）。通过管道输送的餐食后的TEF在大小或持续时间上与摄入餐食后的TEF无显著差异。这两种类型的餐食也导致呼吸商出现类似变化。这些结果表明，大部分食物热效应在食物到达胃后产生，并且很少有食物热效应是由感官因素或进食的机械方面产生的。
