Jim Abrahams' film First Do No Harm is based on real life and tells the story of an epileptic boy's recovery by switching to a ketogenic (fat-based) diet.  Epileptic children can remain seizure-free even after discontinuing this type of diet, and many can resume eating the ordinary way.  Ketogenic diets have also helped those with ALS, autism, cancer, Parkinsons and Type 2 (adult onset) diabetes.