Bile acids are usually measured by drawing blood from the patient. After the blood is drawn, it is centrifuged in a centrifuge, and the bile acids are measured in the serum after centrifugation. The measurement of bile acids reflects the state of the patient’s hepatic and intestinal circulation. When the patient’s bilirubin metabolism is normal and the hepatic and intestinal circulation is normal, the bile acids are generally within the normal range. When the patient’s bile excretion is impaired, the bile acid will be too high. For the normal population, pregnant women may experience elevated bile acids during pregnancy, for which the patient should be monitored regularly to avoid the possibility of the child’s neurological development being impaired by high bile acids, leading to mental deficiencies. In addition, for patients with high bile acids, the normal diet should pay attention to eat less food with high cholesterol content, such as egg yolks, animal offal, animal fats and seafood squid and other foods.