Ketogenic diets are a group of high-fat, moderate-protein, and very low-carbohydrate diets given to treat some children and adolescents with epilepsy, and some adults with epilepsy and other diseases. The name refers to the increased production of ketone bodies as a result of this special diet. Ketone bodies are three compounds that are formed during the of and are ordinarily excreted in the urine. An abnormally high level of ketone bodies is called keto-sis, and this condition is the goal of the ketogenic diet. It is thought that ketosis helps to control the frequency and severity of epileptic seizures, even though the reasons for this effect are not fully understood as of 2007.