The ketogenic diet is one of the oldest available treatments for epilepsy. It is a medically supervised high fat, low carbohydrate, and restricted protein diet that maintains a chronic state of ketosis while providing proteins and calories for adequate growth. The ketogenic diet compares favourably with the newer antiepileptic drugs (AED's) which have been developed for the treatment epilepsy in children Studies on the newer antiepileptic drugs such as vigabatrin, lamotrigine, tiagabine and gabapentin indicate that only 3% to 10% of all intractable patients achieve complete relief of seizures with the introduction of these newer drugs. Whereas with the ketogenic diet, 33% of patients with intractable epilepsy have more than 50% reduction in seizures and 15-20% become seizure free.Also, many of the children who are maintained on the diet are able to have their antiepileptic drugs decreased or withdrawn. This leads to improvement in alertness, behaviour and cognition.