Document Detail

A twin study of the effects of energy density and palatability on energy intake of individual foods.
MedLine Citation:
PMID:  16445951     Owner:  NLM     Status:  MEDLINE    
The relative effects of energy density and palatability on energy intake, and whether there are familial influences on these effects, are not known. We investigated this issue in 7 pairs of healthy, male monozygotic twins (mean+/-SD age 26.3+/-8.6 years, BMI 23.7+/-3.2 kg/m(2)) in a clinical study involving covert ad libitum feeding of high-fat (HF, approximately 40%) and low-fat (LF, approximately 20%) diets in two 9-day phases. Diets were matched for average energy density, protein, fiber, and initial reported taste pleasantness, but these factors varied among the individual foods. Relationships between energy density, palatability, and energy intake were explored using regression and path analyses. Food energy density was positively associated with average taste pleasantness (r=0.46, P=0.03) independent of fat content, while energy intake from individual foods was positively associated with both energy density (r=0.56, P=0.007) and taste pleasantness (r=0.73, P<0.0001). In path analysis, both energy density and taste pleasantness directly influenced energy intake, and energy density also indirectly influenced energy intake by influencing taste pleasantness. In addition, there were significant within-twin pair similarities for the energy density-taste pleasantness and energy density-energy intake relationships (P<0.03) with the result that some twin pairs but not others identified foods high in energy density as more pleasant tasting and consumed relatively more energy from them compared to foods low in energy density. These results suggest that there are familial influences on the extent to which high energy density foods are preferred and contribute to total energy intake.
Megan A McCrory; Edward Saltzman; Barbara J Rolls; Susan B Roberts
Publication Detail:
Type:  Clinical Trial; Journal Article; Research Support, N.I.H., Extramural; Twin Study     Date:  2006-01-27
Journal Detail:
Title:  Physiology & behavior     Volume:  87     ISSN:  0031-9384     ISO Abbreviation:  Physiol. Behav.     Publication Date:  2006 Mar 
Date Detail:
Created Date:  2006-03-13     Completed Date:  2006-05-12     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0151504     Medline TA:  Physiol Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  451-9     Citation Subset:  IM    
The Energy Metabolism Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, 711 Washington St., Boston, MA 02111-1524, USA.
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MeSH Terms
Dietary Fats / pharmacology
Energy Intake / physiology*
Food Preferences / physiology*
Taste / physiology
Grant Support
Reg. No./Substance:
0/Dietary Fats

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