An official Internet site of the United States govt. Here's how you understand we are Formal. dot gov icon Nonabsorbed ursodiol passes to the colon wherever it is generally seven-dehydroxylated to lithocholic acid. Some ursodiol is epimerized to chenodiol (CDCA) by means of a seven-oxo intermediate. Chenodiol also undergoes https://www.youtube.com/watch?v=A07qHOeWON8