The gamma–glutamyl transferase (GGT) test may be used to determine the cause of elevated alkaline phosphatase (ALP). Both ALP and GGT are elevated in disease of the bile ducts and in some liver diseases, but only ALP will be elevated in bone disease.
What does a high GGT level mean?
Gamma-glutamyl transpeptidase (GGT) test. … GGT is concentrated in the liver, but it’s also present in the gallbladder, spleen, pancreas, and kidneys. GGT blood levelsare usually high when the liver is damaged. This test is often done with other tests that measure liver enzymes if there’s a possibility of liver damage.