Journal of the American College of Nutrition, Vol 11, Issue 3 263-266, Copyright © 1992 by American College of Nutrition

JOURNAL ARTICLE

Brief communication: changes in thermogenesis and caloric efficiency with high and normal protein-reducing diets in women

H. L. Johnson, M. D. Van Loan, A. Z. Belko, T. F. Barbieri, P. L. Mayclin and S. P. Virk
USDA/ARS/WHNRC, Presidio of San Francisco, CA 94129.

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.