Chenodeoxycholic acid as colorless needle crystal, odourless, taste bitter.Almost insoluble in water, soluble in ethanol, ice acetic acid, slightly soluble in chloroform.Is currently the world's dosage is one of the largest drug for gallstones, and synthetic ursodeoxycholic acid(UDCA) and other steroid compound materials.By bile extraction.
      After a series of experiments and clinical observation research, found that chenodeoxycholic acid or ursodeoxycholic acid can increase the content of bile acid in the bile, improve the ability of biliary cholesterol dissolved, after a long-term medication, can play a part of the cholesterol stone was reduced, or even disappear.Then these one hundred and twenty years, the above two drugs is quickly becoming commonly used therapeutic agents in the treatment of gallstones, are all the rage in western society.
      Cholic acid is a kind of sterols, is four major human one of the most abundant content of bile acid, derived from it and gca taurocholic acid is the main human bile acid.Liver secretion to bile in the bile salt (sodium salt of bile acid) is a powerful emulsifier.After bile flow through the upper small intestine, bile salt emulsifying fat, help the digestion and absorption.In the emulsifying fat globules fatty acid glyceride and absorbed by the lower part of the small intestine, bile salt is absorbed by weight.They returned to the liver and be reused, so total bile salt circulation between liver and small intestine.Bile salt is not only to the fat, but also for all fat-soluble nutrient absorption is particularly important.When because suffer from diseases secretion of bile salt formation or defect, will appear in the dung digestion and absorption of fat.At this point, the fat-soluble vitamins A, D, E, K cannot be fully absorbed, can cause A vitamin A nutritional deficiency.