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Home Tests Gamma-Glutamyl-Transpeptidase (GGT)
Gamma-Glutamyl-Transpeptidase (GGT)
A gamma-glutamyl transferase (GGT) test measures the amount of GGT in the blood. GGT is an enzyme found throughout the body, but it is mostly found in the liver. When the liver is damaged, GGT may leak into the bloodstream.