Home ยป If a person undergoes a prolonged fasting then his urine will be found to contain higher levels of Excretory System MCQs If a person undergoes a prolonged fasting then his urine will be found to contain higher levels of January 24, 2022 4 Views Q. If a person undergoes a prolonged fasting then his urine will be found to contain higher levels of A. Ketones B. Amino acids C. Fats D. Glucose Answer: Ketones