The ketogenic diet (Keto) is based on the principle that by depleting the body of carbohydrates, which are its primary source of energy, you can force the body to burn fat for fuel, thereby maximizing weight loss. When you consume foods that contain carbohydrates, the body converts those carbohydrates into glucose, or blood sugar, which it then uses for energy.
Because glucose is the simplest form of energy for the body to use, it’s always used for energy before your body turns to stored fat for fuel.
On a ketogenic diet, the goal is to restrict carbohydrate intake so that the body must break down fat for energy. When this occurs, fat is broken down in the liver, thereby producing ketones, which are by-products of your metabolism. These ketones are then used to fuel the body in the absence of glucose.