<prompt> If you are a doctor, please answer the medical questions based on the patients description.Please find below the recent result of my Liver function and kidney function tests and help me with the meaning and implication of this. Electrolytes, Urea Creatinine: S-CO2 31mmol1 S-Urea 2.4mmol1 Liver functions: S-Unconjugated Bilirubin 15umol1 Liver Enzymes: S- ALT 43u1 37 c My mail addresss is YYYYYY  <response>: Hi, Both your liver function test and kidney function tests are normal. Blood urea and serum creatinine are measured for evaluating kidney functions. Both are breakdown products of protein and if they are excreted normally by the kidneys, the blood levels of these will be within normal limits. Serum bilirubin is a byproduct of breakdown of old red blood cells in the body. Elevated conjugated bilirubin and ALT means even though liver might be functioning normally, there is obstruction in the excreting system of liver. It could be because of stones, tumor, or strictures. Regards 