1. If alanine aminotransferase is greater than 80, it is already a mild liver injury. No matter what the reason, they are no longer in a healthy state and cannot apply for a health certificate. This situation needs to be treated under the guidance of a doctor for a period of time, and it is advisable to treat it after the transaminase returns to normal.
2. If alanine aminotransferase is greater than 40 and less than 80, it is necessary to further check hepatitis A antibody and hepatitis E antibody. If these two hepatitis viruses can be excluded, especially if the cause is fatty liver, a certificate can also be issued.