Not all calories are alike. Carbohydrate calories facilitate fat storage. Carbohydrate calories are metabolized to alpha glycerol phosphate, which your body uses to make triglyceride, which is stored fat. Excess protein is metabolized to glucose by gluconeogensis, which is metabolized to alpha glycerol phosphate for fat storage. Fat is not metabolized to glucose, so fat storage (from alpha glycerol phosphate) is not as direct, but your body can make alpha glycerol phosphate by alternate pathways. You can store fat in the absense of carbohydrate. The magic in low carbohydrate diets is not necessarily that your body processes low carb and high carb calories differently, but that the more carbohydrate you eat, the more alpha glycerol phosphate is available for fat storage. The less carbohydrate you eat, the less alpha glycerol phosphate is available for fat storage. The more calories you eat, the more calories are available for fat storage. If you’re not hungry, don’t eat. The less you eat, the faster you are going to lose weight.