The ketogenic diet is a high-fat, protein-rich, low-carbohydrate diet that has been studied for possible therapeutic use in many other neurological conditions, some of which include: Alzheimer's disease, amyotrophic lateral sclerosis Sclerosis, headaches, nerve trauma, pain, Parkinson's disease and sleep disorders. The classic ketogenic diet is not a balanced diet and contains only small amounts of fresh fruits and vegetables, fortified grains, and calcium-rich foods. In particular, B vitamins, calcium, and vitamin D must be supplemented artificially.