Your body weight is determined primarily by the amount of carbohydrate you eat. Increase the amount of carbohydrate you eat quickly, and you’ll quickly increase your body weight. Increase the amount of carbohydrate you eat slowly, and you’ll slowly increase your body weight. Calories count, but calories count somewhat. Carbohydrate drives fat storage, so the more carbohydrate you eat, the more fat you store. To lose weight, you have to drastically cut calories and carobhydrate, or you won’t lose weight quickly enough to stay motivated on your diet. But in the long and short run, your body weight is determined mostly by how much carbohydrate you put in your mouth, because carbohydrate drives fat storage.