Back when I worked as a clinical dietitian at a local hospital, I worked with a family whose daughter (about 2 y.o.) had many grand mal seizures. To prevent her from hurting herself if she had a seizure while in bed in the hospital, she would have to wear a football helmet. All types of meds were tried, but none seemed to help as much as was desired. We then tried the ketogenic diet along with the meds and did see improvement. However, this was an isolated case. And like Deena said, it was not an easy diet to follow - very little in the way of carbohydrates, with lots of MCT (medium-chain triglycerides) oil to boost the calories. Not a very palatable diet.