The ketogenic diet is a high fat, adequate protein, low carbohydrate diet designed to mimic many of the biochemical changes associated with prolonged starvation.
It is used for the treatment of intractable seizures i.e. seizures which have not responded to normal anti-convulsant medications and therapies.
Some people believe that it can be used to manage intractable seizures in people with autism. Some people also believe that it can be used to improve the core symptoms of autism.