An abnormal gamma-glutamyltransferase of 147 U/L is usually indicative of impaired liver function. Gamma-glutamyltransferase is the enzyme that transfers the gamma-glutamyl group on glutathione to another amino acid or peptide. Usually gamma-glutamyltransferase is derived from the liver and is elevated when there is hyper-synthesis in the liver or when bile output is blocked, so gamma-glutamyltransferase is helpful in identifying diseases of the hepatic system. The normal value range of γ-glutamyltransferase is related to gender, usually the normal value range is between 10 and 60 U/L for men and between 8 and 45 U/L for women. The serum γ-glutamyl transferase value of 147U/L is abnormal, usually suggesting possible liver function injury. If the serum gamma-glutamyltransferase test value is abnormal, you should go to the hospital in a timely manner, under the guidance of a physician to carry out regular treatment, do not blindly purchase their own medication, so as to avoid medication is not the right delay in the condition.