when ursodeoxycholic acid , a bile acid that decreases biliary cholesterol saturation and dissolves gallstones , was administered at a dose of 500 mg to each subject , 59 % +/- 8 % ( mean +/- sem ) of this bile acid was excreted within 24 h from the ileostomies .
C0042105
ursodeoxycholic acid
C0008350
gallstones