Stercobilin
Stercobilin is the main bile pigment that gives stool its characteristic brown color. It is formed in the intestine from bilirubin, which enters the digestive tract via bile.
- Normal values and function:
Stercobilin gives stool its typical color and indicates proper bile pigment processing and excretion.
- Decreased stercobilin levels:
- obstruction of the bile ducts (blockage of the gallbladder or liver ducts);
- impaired liver function (hepatitis, cirrhosis);
- bile flow disorders (cholestasis);
- diseases of the small intestine affecting absorption and pigment metabolism.
- Increased stercobilin levels:
Typically, increased levels are not observed, as the pigment is naturally produced from bilirubin in the intestine.
- Clinical significance:
Stool discoloration (light or pale color) is associated with decreased stercobilin and indicates serious liver or bile duct dysfunction, requiring further investigation.
Stercobilin analysis is used to assess liver function, bile duct condition, and diagnose digestive system disorders.