Also available in 1 mL, 1 mg, 5 mg, 25 mg, 50 mg, 100 mg and bulk. Please contact Fisher for quotes. 3beta-Ursodeoxycholic acid (Isoursodeoxycholic acid) is a bile acid that exhibits good tolerance and good intestinal absorption when administered orally.3beta-Ursodeoxycholic acid (Isoursodeoxycholic acid) can undergo enzymatic isomerization in the intestines and the 3beta-Ursodeoxycholic acid (Isoursodeoxycholic acid) undergoes enzymatic isomerization in the intestine and liver and produces UDCA. Purity 99.89%