The Utilization of Dietary Protein and Energy as Affected by Fat and Carbohydrate

Abstract

The 24-hour metabolism of two pairs of male subjects, about 23 years of age, was measured by use of the respiration calorimeter. Two diets furnishing equal amounts of protein and energy but differing widely in fat content were compared as to daily nitrogen balance and heat production. One pair of subjects received the low-fat diet first with subsequent assignment to the companion diet high in fat. The reverse order was followed with the other pair. The differences in total daily energy expenditures and nitrogen balances between the two diets were insignificant.