Ketostix test strips provide a convenient way of testing urine for the presence and concentration of acetoacetic acid (ketone). This substance when found in the urine provides information on carbohydrate and fat metabolism. Ketostix Reagent Test Strips Ketostix Reagent Strips are simple and effective to use; they are designed for you to test your urine; to find out if it contains acetoacetic acid, also known as Ketone. This acid is usually found in individuals with diabetes, therefore this product will alert you if there are changes in your condition which may require adjustments in your diet.