Food intake in rats is unaffected by the profile of dietary essential fatty acids

被引:6
作者
Rice, HB [1 ]
Corwin, RL [1 ]
机构
[1] Penn State Univ, Coll Hlth & Human Dev, Dept Nutr, Grad Program Nutr, University Pk, PA 16802 USA
关键词
essential fatty acid; fat; hyperphagia; ingestive behavior; linoleic acid; linolenic acid; satiation; satiety;
D O I
10.1016/S0031-9384(02)00666-2
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
Food intake may be differentially responsive to the type of fat in the diet. The present investigation sought to evaluate the energy intake of rats maintained on either a low-fat or a high-fat diet mixed with an oil rich in either linoleic (18:2; n - 6; safflower oil) or linolenic (18:3; it - 3; flaxseed oil) acid. In Experiment 1, rats (n=28) consumed low-fat versions of either the safflower oil diet or the flaxseed oil diet, each at 9.28% fat (wt/wt). In Experiment 2, different rats (n=28) consumed high-fat versions of these diets, each at 23.6% fat (wt/wt). Within each experiment, the energy intake of rats receiving the safflower oil diet was compared to the energy intake of rats receiving the flaxseed oil diet. Food intake was measured under short-term, Iona-term and food-deprived conditions. In Experiment 1, short-term energy intakes were not different between the groups, thus demonstrating equal acceptance of the test diets. There were no consistent differences in long-term energy intakes between the safflower group and the flaxseed group. In addition, there were no differences in energy intake under the food-deprivation condition. Results from Experiment 2 paralleled those of Experiment 1. Taken together, the present results suggest that the essential fatty acid profile of the maintenance diet does not influence food intake when nutritive oils are the predominant fatty acid source. (C) 2002 Elsevier Science Inc. All rights reserved.
引用
收藏
页码:611 / 619
页数:9
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