The Theory Consuming too many calories makes you fat. To lose weight you must eat fewer calories than you burn.
People eat the same weight of food daily no matter what the calorie or fat content.
Energy density not fat content of diets affects how many calories are eaten. Energy density is the ratio of calories to the weight of food. Portions of food that weigh more and have bigger volume will be more satisfying. Includes more foods with air, water and fiber in order to lose weight to feel satisfied and not deprived. The Truth Calories do count.