The ketoacidotic coma is a loss of consciousness that occurs when the body is in ketosis. Ketosis is the condition where excessive ketone bodies are in circulation in the blood, and can cause a lowering of blood pH. This occurs when the body uses excessive amounts of fat rather than carbohydrates as the primary energy source. This occurs in diabetics when the metabolism shifts away from the use of glucose for energy. The brain cannot function with ketone bodies as the only energy source and goes into coma, which can be life threatening. Dehydration and brain cell starvation along with an unbalanced blood pH all lead to the ketoacidotic coma.