Effect of diet textural characteristics on the temporal rhythms of feeding in rats

Author(s): Thibault, L.

Journal/Book: Physiol Behav. 1999; 65: the Boulevard Langford Lane, Kidlington, Oxford Ox5 1GB, England. Pergamon-Elsevier Science Ltd. 893-899.

Abstract: To examine whether the diurnal rhythms of protein-rich and carbohydrate-rich diet ingestion can be altered by presenting the diets in different textural forms, adult male Wistar rats were assigned to two dietary groups. One group received a two-way choice between high-protein powder and high-carbohydrate granular (HPP-HCG) diets. In the other group the textures were reversed [high-protein granular and high-carbohydrate powder (HPG-HCP) diets]. Rats fed HPP-HCG diets selected significantly less protein (kcal) vs, rats fed HPG-HCP diets, during the 24-h and 12-h dark phase and during the 4-h early and late dark phases. Carbohydrate intakes of the two dietary groups were not significantly different. Total caloric intake for the HPG-HCP dietary;group was significantly higher than that of the HPP-HCG dietary group during the 24-h and 12-h dark phase. Body weight was significantly lower in rats fed HPP-HCG diets. In conclusion, macronutrient-rich diets presented in different textural forms alter protein-rich diet ingestion and total energy intake.

Note: Article Thibault L, McGill Univ, Sch Dietet & Human Nutr, 21111 Lakeshore, St Anne De Bellevue, PQ, CANADA

Keyword(s): texture; protein; carbohydrate; food intake; diurnal rhythm; meal; SELF-SELECTION; ADULT-RATS; MACRONUTRIENT INTAKE; MEAL PATTERN; PROTEIN; CARBOHYDRATE; FORM; PREFERENCES; HYPERPHAGIA; ENERGY

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