Which pigment is produced in the colon from microbial oxidation of bilirubinogen?

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Multiple Choice

Which pigment is produced in the colon from microbial oxidation of bilirubinogen?

Explanation:
In the colon, gut bacteria oxidize bilirubinogen to form stercobilinogen, which is then further oxidized to stercobilin, the brown pigment responsible for feces’ color. Urobilin, by contrast, comes from urobilinogen that is absorbed and processed to give the urinary pigment urobilin. The other listed compounds are not products of this colonic microbial oxidation pathway.

In the colon, gut bacteria oxidize bilirubinogen to form stercobilinogen, which is then further oxidized to stercobilin, the brown pigment responsible for feces’ color. Urobilin, by contrast, comes from urobilinogen that is absorbed and processed to give the urinary pigment urobilin. The other listed compounds are not products of this colonic microbial oxidation pathway.

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