What is γ-GTP (Gamma-GTP)?
Also written as：γ-GT ／ GGT
γ-GTP is an enzyme found in abundance in the liver and bile ducts. It rises in the bloodstream when the liver or biliary tract is damaged or affected by alcohol. In health checkups, it is evaluated as a liver function marker alongside AST and ALT.
Reference range guideline
Generally, up to approximately 50 U/L for men and 30 U/L for women is considered the guideline (values may vary by facility and measurement method).
* Reference ranges vary by testing facility, measurement method, age, sex, and other factors. Please check the reference range printed on your result sheet.
How to interpret an out-of-range result
Elevated levels may suggest alcohol consumption, fatty liver, or biliary tract abnormalities. Since the cause cannot be identified from this value alone, further investigation such as abdominal ultrasound may be recommended.
Related tests and conditions
Frequently asked questions
Why is my γ-GTP high even though I don't drink alcohol?
Related terms
Sources & references
This page provides general information only and is not intended for diagnosis or treatment. Please consult the physician at your chosen facility regarding the interpretation of your health checkup results.