A possibly grave condition in which excessive amounts of chemicals called keratones accumulate in the body. Ketones are normal products of fat metabolism, but are made in excess when body cells are unable to use glucose as an energy source. This occurs in prolonged vomiting, starvation, and in untreated diabetes mellitus when a lack of insulin stops glucose from entering cells. Symptoms include loss of appetite, nausea, abdominal pain, and sweet, acetone smelling breath. Ketosis can eventually result in unconsciousness, confusion and death. Treatment is focused on the underlying cause.