GGT blood test
Explanation
Gamma-glutamyl transferase (GGT) is an enzyme, a protein that helps chemical reactions happen in the body. It is found mainly in the liver. A GGT blood test can help investigate liver problems or problems in the bile ducts, which carry digestive fluid from the liver.
Does high GGT mean alcohol caused it?
No. Alcohol can raise GGT, but so can liver or bile duct conditions and some medicines. A raised value does not establish the cause or prove harmful drinking. Your clinician considers other blood tests and your medical history.
Why compare GGT with ALP?
Alkaline phosphatase (ALP) is another enzyme measured in blood. It can rise with either bone or liver conditions. If ALP and GGT are both raised, a liver or bile duct cause is more likely. If ALP is raised but GGT is not, a bone cause may be more likely.
This comparison is a clue, not a diagnosis. Tell your clinician about medicines, supplements and alcohol use so the result can be interpreted accurately.
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