Ketostix Reagent Strips for Urinalysis measure the concentration of ketones in urine. Bayer Ketostix are user friendly and provide results quickly. Each box includes instructions and a color scale to help interpret the results. Provide a fast, convenient way of testing urine for the presence and concentration of acetoacetic acid (ketone). Use of these strips can alert user and doctor or diabetes educator to make changes or adjustments needed in the diet and medication.