Urobilin

Urobilins or Mesobiline are bile pigments and degradation products of hemoglobin and contribute to the color of the feces of most mammals at. They are formed in the gut by oxidation of bilirubin via the intermediate stage of the colorless urobilinogens. Despite its name, the urobilins are only slightly involved in the coloration of the urine; they are therefore less to Urochromen ( urine dyes) as to the Koprochromen ( Fäkalpigmente ).

The normal of the faeces and urine excreted daily amount of urobilins is about 150 mg. Liver disease or hemolysis can lead to increased excretion of urobilin, while a closure of the biliary tract to lack of quantity indicated by a decreased in urine and feces.

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