Increased urobilinogen

Urobilinogen is converted from bound bilirubin. Combined with bilirubin in the lower small intestine and colon, it is decoupled through the action of intestinal bacteria. After several stages of reduction, bilirubin becomes urobilinogen, which is then excreted with feces. Part of the urobilinogen is absorbed from the intestine into the portal vein, and most of it is taken up by hepatocytes and then excreted into the intestinal fluid (intestinal liver circulation), and part of it enters the systemic circulation from the portal vein and is excreted from the urine through the kidney. A variety of factors can cause an increase in urobilinogen.