Abnormal stool composition Increased fecal bile acid 2021-10-15T13:54:55Z Bile acids are synthesized from cholesterol in the liver and have major roles in the absorption of lipids in the small intestine. After their involvement in micelle formation in the small intestine, they are usually effectively reabsorbed in the terminal ileum, and efficiently (over 95%) reabsorbed by the liver from the portal venous blood, and resecreted. Elevated amount of bile acids in the feces.