In response, the liver begins to repackage fatty acids into ketones, which are allowed access into the brain for fuel. The ketogenic diet makes your body think it is in a state of ketosis, making you burn fat for fuel instead of carbohydrates or protein. According to the USDA, the standard American diet follows a macronutrient composition of 40 percent fat, 11 percent protein and 48 percent carbohydrate. The ketogenic diet requires eating your macronutrients at a ratio of 60 percent fat, percent protein and 5-10 percent carbohydrates. When in ketosis, the body begins to burn stored fats for energy, and this results in the build-up of acids, known as ketones, in your blood.