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Dietary fat and body fat: an intervention study
K R Westerterp1, W P Verboeket-van de Venne, M S Westerterp-Plantenga
1Department of Human Biology, University of Limburg, Maastricht, The Netherlands.
Summary
Dietary fat intake influences body fat mass, but only when changes in energy intake accompany alterations in fat consumption. This study highlights the interplay between diet composition and overall energy balance in body composition changes.
Area of Science:
- Nutrition Science
- Human Physiology
- Body Composition Analysis
Background:
- Habitual dietary patterns significantly influence body composition.
- Understanding the relationship between dietary fat and body fat is crucial for public health.
Purpose of the Study:
- To assess body composition in relation to habitual diet.
- To evaluate changes in body composition after a six-month dietary intervention focusing on fat intake.
Main Methods:
- Randomized controlled trial with two groups: reduced-fat and full-fat diets.
- 108 women and 109 men (aged 19-55) with varying BMIs participated.
- Body composition was measured using deuterium dilution, and food intake via three-day dietary records.
Main Results:
- Dietary fat-carbohydrate ratio and age explained significant variance in body fat percentage at baseline.
- The reduced-fat group showed a decrease in fat intake and non-significant change in body fat mass.
- The full-fat group showed an increase in fat intake and a significant increase in body fat mass.
Conclusions:
- Dietary fat content impacts body fat mass.
- This effect is mediated by the influence of dietary fat on overall energy intake.
- Changes in body fat mass are contingent on concurrent changes in energy intake.