title: Consumption of fructose-sweetened beverages for 10 weeks reduces net fat oxidation and energy expenditure in overweight/obese men and women.
abstract: OBJECTIVE
  The results of short-term studies in humans suggest that, compared with glucose, acute consumption of fructose leads to increased postprandial energy expenditure and carbohydrate oxidation and decreased postprandial fat oxidation. The objective of this study was to determine the potential effects of increased fructose consumption compared with isocaloric glucose consumption on substrate utilization and energy expenditure following sustained consumption and under energy-balanced conditions.
  
  
  METHODS
  As part of a parallel arm study, overweight/obese male and female subjects, 40-72 years, consumed glucose- or fructose-sweetened beverages providing 25% of energy requirements for 10 weeks. Energy expenditure and substrate utilization were assessed using indirect calorimetry at baseline and during the 10th week of intervention.
  
  
  RESULTS
  Consumption of fructose, but not glucose, led to significant decreases of net postprandial fat oxidation and significant increases of net postprandial carbohydrate oxidation (P<0.0001 for both). Resting energy expenditure (REE) decreased significantly from baseline values in subjects consuming fructose (P=0.031) but not in those consuming glucose.
  
  
  CONCLUSIONS
  Increased consumption of fructose for 10 weeks leads to marked changes of postprandial substrate utilization including a significant reduction of net fat oxidation. In addition, we report that REE is reduced compared with baseline values in subjects consuming fructose-sweetened beverages for 10 weeks.
authors.affiliation: Department of Nutrition, University of California, Davis, Davis, CA, USA.
authors.forename: C L
authors.initials: CL
authors.lastname: Cox
authors.forename: K L
authors.initials: KL
authors.lastname: Stanhope
authors.forename: J M
authors.initials: JM
authors.lastname: Schwarz
authors.forename: J L
authors.initials: JL
authors.lastname: Graham
authors.forename: B
authors.initials: B
authors.lastname: Hatcher
authors.forename: S C
authors.initials: SC
authors.lastname: Griffen
authors.forename: A A
authors.initials: AA
authors.lastname: Bremer
authors.forename: L
authors.initials: L
authors.lastname: Berglund
authors.forename: J P
authors.initials: JP
authors.lastname: McGahan
authors.forename: P J
authors.initials: PJ
authors.lastname: Havel
authors.forename: N L
authors.initials: NL
authors.lastname: Keim
mesh_terms: D000368:Aged; D001481:Basal Metabolism / Q000187:drug effects*; D001628:Beverages; D050260:Carbohydrate Metabolism / Q000187:drug effects*; D019422:Dietary Sucrose / Q000494:pharmacology*; D002149:Energy Intake; D004734:Energy Metabolism / Q000187:drug effects; D005260:Female; D005632:Fructose / Q000494:pharmacology*; D005947:Glucose / Q000494:pharmacology*; D006801:Humans; D050356:Lipid Metabolism / Q000187:drug effects*; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000378:metabolism*; D010084:Oxidation-Reduction; D013549:Sweetening Agents / Q000494:pharmacology
chemical_list: D019422:Dietary Sucrose; D013549:Sweetening Agents; D005632:Fructose; D005947:Glucose