Although the word “keto” may be new, this style of eating has been around for many years. Normally prescribed to treat epilepsy, the ketogenic diet encourages eating mostly fat and very little carbohydrates–typically 75 percent of calories from fat, 20 percent from protein and 5 percent from carbs. In general, the body uses carbs as the primary fuel source for brain, muscle, and organ function. When you deprive the body of carbs for fuel, it starts to break down fat molecules, known as ketones, to feed those physiological processes. Hence the name, “keto”.