My son had his first grand mal seizure when he was 18 and he had a complete negative medical workup at that time. He then had his second seizure 6 months later and he was started on medication. He had become a vegetarian 1.5 years before he had his first seisure. Because ketogenic diet has been successfully used to treat intractable seizure, I cannot help to wonder if his seizure was precipitated by a not well-balanced diet?