Weight loss over 2 years in adults assigned to 1 of 4 diets with different proportions of Carbohydrate/Protein/Fat as listed. There was no significant difference in weight loss related to the macronutrient composition.
Data from Sacks FM, Bray GA, Carey VJ, et al. Comparison of weight-loss diets with different compositions of fat, protein, and carbohydrates. N Engl J Med 2009; 360(9):859–873.