title: Brief communication: changes in thermogenesis and caloric efficiency with high and normal protein-reducing diets in women.
abstract: A pilot study with four women (40-60% above ideal weight, 32-42 years old) was conducted for 6 weeks of weight maintenance, 12 weeks at 50% calories (1000 and 1200 kcal/day) and 6 weeks of weight maintenance after weight loss. Two women consumed 17% and two 32% of their calories from protein during restriction; their energy metabolism and body composition changes were examined. The use of doubly labeled water for measuring energy expenditure during weight loss was evaluated. Although the 32% protein diet did not reduce lean body tissue loss, the apparent increased efficiency of calorie utilization compared to the 17% protein diet is worthy of further investigation. Thermic effect of a meal was greatly reduced in these women compared to previously reported responses. Further refinements of the doubly labeled water method are needed prior to application in weight loss studies.
authors.affiliation: USDA/ARS/WHNRC, Presidio of San Francisco, CA 94129.
authors.forename: H L
authors.initials: HL
authors.lastname: Johnson
authors.forename: M D
authors.initials: MD
authors.lastname: Van Loan
authors.forename: A Z
authors.initials: AZ
authors.lastname: Belko
authors.forename: T F
authors.initials: TF
authors.lastname: Barbieri
authors.forename: P L
authors.initials: PL
authors.lastname: Mayclin
authors.forename: S P
authors.initials: SP
authors.lastname: Virk
mesh_terms: D000328:Adult; D001823:Body Composition; D001833:Body Temperature Regulation; D001835:Body Weight; D004044:Dietary Proteins / Q000008:administration & dosage*; D004734:Energy Metabolism; D005260:Female; D006801:Humans; D010865:Pilot Projects
chemical_list: D004044:Dietary Proteins