Urinary ketone bodies are routine urine tests that are also able to detect fat metabolism in the body. Urinary ketone bodies are routine urine tests for acetone, beta-hydroxybutyric acid, and acetoacetic acid, which are intermediates of fat in the body, so urinary ketone bodies are also able to detect fat metabolism in the body. Normal people produce very little of it, so it is usually negative when qualitative ketone body tests are performed. However, in cases of impaired glucose metabolism from various causes, starvation, increased lipolysis, and diabetic ketoacidosis, the body produces ketone bodies at a rate that exceeds the rate at which they are utilized by the tissues, leading to ketonemia and ketonuria. In the case of abnormal urine ketone bodies, it is recommended to visit the hospital and ask the doctor to make a judgment.