High alanine aminotransferase can be prevented by cultivating healthy lifestyle habits, regular health screenings, and taking liver medications. 1. Cultivate healthy habits: The liver has a very strong compensatory function, and in many cases liver damage can be recovered through “rest”. Therefore, it is very important to ensure a healthy diet, regular and moderate exercise, sleep well, stay up late, and avoid taking medicines and drinking too much alcohol to protect the liver. 2. Regular health screening: For people with high alanine aminotransferase, they should strengthen the physical examination and liver-related health screening, so as to take effective preventive measures in advance to avoid liver organogenesis. 3. Take hepatoprotective drugs: Hepatoprotective drugs have a certain effect on protecting the liver, such as polyene phosphatidylcholine and silymarin, etc., and should be used under the guidance of a doctor. If there is high alanine aminotransferase, you should go to the hospital in time and intervene according to the doctor’s advice, do not use drugs blindly.