Abstract
Ketone bodies, comprising β-hydroxybutyric acid (BHB), acetoacetate (AcAc), and acetone, play a vital role as essential energy substrates. In individuals with diabetes, ketone bodies can be elevated under various conditions, including diabetic ketoacidosis, use of sodium-glucose transporter type 2 (SGLT2) inhibitors, and extreme carbohydrate restriction. There are three methods for measuring ketone bodies. Urine ketone analysis (AcAc) is a standard clinical test, whereas blood ketone testing (BHB+AcAc) is valuable in identifying or resolving diabetic ketoacidosis. Recently, technology for measuring breath acetone has been introduced, which provides an easy means of monitoring ketogenic diets in obese individuals. The basic breath alcohol detector also reacts with breath acetone. Therefore, it is important for professional drivers taking SGLT2 inhibitors to be cautious as workplace breath alcohol detectors may show false-positive results. Conversely, if a positive result is obtained, a detailed examination of ketosis is necessary. This review provides an overview of ketone body measurements in individuals with diabetes.