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Food texture differences affect energy metabolism in rats
1Department of Pediatric Dentistry, Kyushu University Faculty of Dental Science, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan. okak@dent.kyushu-u.ac.jp
Journal of Dental Research
|May 27, 2003
Summary
Soft food textures may promote obesity. Rats fed soft pellets, requiring less chewing, developed greater adiposity and reduced post-meal body temperature increase compared to controls, suggesting impaired energy metabolism.
Area of Science:
- Nutritional Science
- Metabolic Regulation
- Physiology
Background:
- Dietary factors like taste and nutrients influence satiety and energy balance.
- The role of food texture and mastication in energy metabolism is less understood.
Purpose of the Study:
- To investigate the impact of long-term food texture on body weight, adiposity, and thermogenesis.
- To determine if reduced mastication due to soft food affects energy expenditure.
Main Methods:
- Rats were fed either standard or soft pellets from weaning (4 weeks) until 26 weeks.
- Body weight gain, adiposity, food intake, and post-prandial thermogenesis were assessed.
Main Results:
- Soft-fed rats exhibited significantly greater adiposity compared to controls.
- No significant difference in daily food intake was observed between groups.
- Post-prandial thermogenesis, indicated by body temperature increase, was significantly lower in soft-fed rats.
Conclusions:
- Food texture influences energy metabolism, primarily by altering post-prandial thermogenesis.
- Reduced mastication associated with soft foods may lead to a tendency toward obesity due to long-term energy deficiency.
- Food texture is a potential factor in the regulation of body weight and obesity development.