Ursodeoxycholic acid is one of the main active ingredients in bear bile powder. The main ingredients of bear bile powder include bile acids, amino acids, etc. Among them, bile acids are considered to be the main active ingredients in bear bile powder, and the bile acids mainly include ursodeoxycholic acid and goose deoxycholic acid. Ursodeoxycholic acid is used to increase the secretion of bile acids, reduce cholesterol and cholesterol lipids in bile, and facilitate the gradual dissolution of cholesterol in gallstones. Ursodeoxycholic acid can be extracted from bear bile, but it can also be obtained through artificial synthesis. Ursodeoxycholic acid cannot be synthesized and can only be obtained by processing natural products. Ursodeoxycholic acid is one of the main active ingredients of bear bile powder, the two medicinal efficacy is largely the same, need to be used under the guidance of a professional physician, not blindly used on their own.