The strips aren't 100 percent reliable. Hydration can affect the concentration of ketones in your urine, which may give an incorrect reading. Although the urine strips aren't precise, they can give you an idea of whether you're eating too many carbs. Blood ketone tests provide better results. Our results suggest that urine testing for ketosis in the scope of monitoring compliance with a KD in adults is best done in the early morning urine and several hours after dinner late in the evening. Reagent Strips for Urinalysis provide tests for Glucose, Bilirubin, Ketone (acetoacetic acid), Specific Gravity, Blood, pH, Protein, Urobilinogen, Nitrite, and Leukocytes in urine.