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Stercobilinogen

Authoring team

Stercobilinogen is a bile pigment derived from conjugated bilirubin during transit through the gastrointestinal tract. It is formed due to a reduction reaction carried out by bacterial enzymes. It is colourless and water soluble.

Stercobilinogen may have several fates:

  • the majority is oxidized to stercobilin within the gastrointestinal tract
  • roughly 10% is reabsorbed and reconveyed to the liver via the portal circulation - enterohepatic circulation
  • minimal absorption in rectum and excretion by kidney

Reference

  1. Boyer JL. Bile formation and secretion. Compr Physiol. 2013 Jul;3(3):1035-78.

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