The ketogenic diet, often nicknamed “keto,” is a high-fat diet that mimics fasting physiology. Your brain and body begin to use ketones (derived from stored or ingested fat) for energy instead of blood sugar (glucose)—a state called ketosis. The diet was originally developed to treat epileptic children, but there are many variations, including the Atkins diet. You can achieve ketosis through fasting, diet, exogenous ketones, or a combination.
