The document discusses the ketogenic diet, which is a high-fat, low-carbohydrate diet used to treat intractable epilepsy. It aims to decrease seizures by putting the body into a state of ketosis. The diet has shown to be effective in reducing seizures in 38% of patients after 3 months compared to 6% of control patients. It can be implemented as a classical 4:1 or 3:1 ratio diet, or as a medium chain triglyceride diet, with no difference in efficacy between the two. Strict monitoring of growth, blood tests, seizures and ketone levels is needed when a patient is on the ketogenic diet.