Composition and caloric density of weight loss during caloric restriction in cold

Two groups of six men each lived for 14 days in a cold chamber at 60 F (15.6 C); activity was sedentary and only athletic shorts were worn. During this period one group, A , was semi-starved (600 kcal/day) and the other, B , was completely starved (0 kcal/day). Changes in body composition were measured and caloric density of weight loss was calculated. Mean weight loss was 5.66 kg for A , and 8.56 kg for B . Composition and caloric density of weight loss was almost identical for both groups. Composition of weight loss with regard to fat, protein and water was 39, 10, and 51% for A ; 39, 11, and 49% for B . Caloric density was 3.91 kcal/g for A and 4.06 kcal/g for B . Submitted on February 20, 1961