An Formal Web page of the United States governing administration. This is how you understand we are Formal. dot gov icon Nonabsorbed ursodiol passes into your colon the place it is usually 7-dehydroxylated to lithocholic acid. Some ursodiol is epimerized to chenodiol (CDCA) through a seven-oxo intermediate. Chenodiol also https://www.youtube.com/watch?v=A07qHOeWON8