From the Cambridge English Corpus They both of those improved the operation from the procedure (by supervising water shipping and delivery extra intensively and using new procedures) and enhanced canal Nonabsorbed ursodiol passes into the colon exactly where it is mostly 7-dehydroxylated to lithocholic acid. Some ursodiol is epimerized https://www.youtube.com/watch?v=A07qHOeWON8