Apolzan John W, Carnell Nadine S, Mattes Richard D, Campbell Wayne W
Department of Foods and Nutrition, Purdue University, West Lafayette, IN 47907, USA.
J Nutr. 2007 Jun;137(6):1478-82. doi: 10.1093/jn/137.6.1478.
Many older people experience changes in appetite and consume marginal or inadequate dietary protein. This study was designed to examine the appetitive responses to habitual protein intakes that span the range of adequacy in younger and older men. Twenty-two men (12 younger, aged 21-43 y and 10 older, aged 63-79 y) completed, in random order, three 18-d trials that involved consumption of individualized, isoenergetic menus providing 1.00, 0.75, and 0.50 g protein . kg BW(-1). d(-1), which were 125% (trial P125), 94% (trial P94), and 63% (trial P63) of the Recommended Dietary Allowance for protein. Near the end of each trial, the subjects recorded appetitive sensations hourly throughout one day using a visual analogue scale. Independent of age, ratings of hunger were lower for P125 (1.3 +/- 0.5 cm) than P94 (1.8 +/- 0.8 cm) and P63 (1.8 +/- 0.6 cm) (P = 0.037), and desire to eat was lower during the P125 trial (1.4 +/- 0.5 cm), compared with the P63 trial (2.1 +/- 0.7 cm) (P = 0.003), and P94 (1.8 +/- 0.7 cm) was not different when compared with P63 and P125. Protein intake did not influence fullness. These results show that younger and older men who consume inadequate protein experience appetite changes that may promote increased food intake.
许多老年人会出现食欲变化，饮食中蛋白质摄入处于边缘水平或不足。本研究旨在探究年轻男性和老年男性对习惯性蛋白质摄入量的食欲反应，这些摄入量涵盖了充足范围。22名男性（12名年轻男性，年龄在21 - 43岁之间；10名老年男性，年龄在63 - 79岁之间）以随机顺序完成了三项为期18天的试验，试验中他们食用了个体化的等能量菜单，这些菜单提供的蛋白质分别为1.00、0.75和0.50 g·kg体重⁻¹·天⁻¹，分别为蛋白质推荐膳食摄入量的125%（试验P125）、94%（试验P94）和63%（试验P63）。在每项试验接近尾声时，受试者使用视觉模拟量表，在一天中每小时记录一次食欲感受。与年龄无关，P125组（1.3±0.5 cm）的饥饿评分低于P94组（1.8±0.8 cm）和P63组（1.8±0.6 cm）（P = 0.037），并且在P125试验期间想吃东西的欲望低于P63试验（2.1±0.7 cm）（P = 0.003），P94组（1.8±0.7 cm）与P63组和P125组相比没有差异。蛋白质摄入量不影响饱腹感。这些结果表明，摄入蛋白质不足的年轻男性和老年男性会出现食欲变化，这可能会促使食物摄入量增加。
