Urobilinogen excrete in urine more than normal in case of hepatocellular damage due to viral hepatitis, drugs or toxic substance or in some cases of cirrhosis. A urobilinogen in urine test measures the amount of urobilinogen in a urine sample. Urobilinogen is formed from the reduction of bilirubin. Bilirubin is a yellowish substance found in your liver that helps break down red blood cells. Normal urine contains some urobilinogen. If there is little or no urobilinogen in urine, it can mean your liver isnt working correctly. Too much urobilinogen in urine can indicate a liver disease such as hepatitis or cirrhosis.