Gamma-Glutamyl Transferase Test (GGT)
- Category
- Liver
- Sample
- Blood sample taken from a vein in your arm
- Reports () Terms & Conditions Report time varies with time of sample collection.
- In 2 days
- Fasting
- No Fasting
- Age
- 5+ Years
What Is This Test?
Measures gamma-glutamyl transferase (GGT), a liver enzyme that is sensitive to bile duct problems and alcohol.
Why this test is performed?
Helps find the cause of a raised ALP (liver vs bone), detects bile duct disease and is a marker of regular alcohol intake and some medicines.
Who should take this test?
Jaundice, nausea, abdominal pain or swelling, alcohol use, fatty liver, hepatitis risk, or people on long-term medicines.
Test Preparation
No fasting needed.
Medical disclaimer · for information only, not medical advice
This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.
In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.
Read our Editorial Policy and Medical Review Process.
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Frequently asked questions
Yes. Regular alcohol use commonly raises GGT; levels fall over a few weeks after stopping.
No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.
Blood sample taken from a vein in your arm.
Usually within 11–35 hours after the sample reaches the lab. You will receive the report online.
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