Glutamyl transpeptidase 100U/L may be due to alcoholic liver disease, there may also be due to chronic hepatitis, and may also be due to drug hepatitis. 1. Alcoholic Liver Disease: Alcoholic Liver Disease is a kind of liver disease caused by heavy drinking, which can lead to the manifestation of glutamyl transpeptidase 100U/L, in addition, the patient’s aspartate aminotransferase, alanine aminotransferase can also be elevated. 2. Chronic hepatitis: chronic hepatitis is a kind of disease caused by pathogenic microbial infection, immune response and other factors, patients can have the performance of glutamyl transpeptidase 100U/L, in addition, hepatitis B two-half, abdominal ultrasound and other tests can also appear abnormal performance. 3. Drug hepatitis: drug hepatitis is a kind of liver cell damage caused by the use of drugs, the patients of this disease can appear the performance of glutamyl transpeptidase 100U/L, usually can be relieved after stopping the drug. In addition to the above factors, other causes can also lead to the appearance of glutamyl transpeptidase 100U/L, it is recommended to consult a doctor in time to identify the cause and ask the doctor to deal with it.