Randomozed, three arms:  811 overweight adults to one of four diets; the targeted percentages of energy derived from fat, protein, and carbohydrates in the four diets were 20, 15, and 65%; 20, 25, and 55%; 40, 15, and 45%; and 40, 25, and 35%.  At end of study, diets higher in protein and fat showed greater weight loss and reduced waist circumference than diet high in carbohdyrates.