BINGO! That's part of the metabolic advantage; it takes more energy for the body to digest fats, then proteins, than it does to digest carbs which break up quite quickly and easily. Pair that with the fact that you don't have your body's "fat storage system" cranked into high gear with high levels of insulin and it shouldn't come as a great surprise to these scientists that those eating low carb lost more weight than those eating high carb. C'mon, folks...it's not rocket science!