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Test Mnemonic GGTP Gamma-Glutamyltranspeptidase (GGTP), Serum


Clinical Significance:

A biliary enzyme elevated in all forms of liver disease and useful in the diagnosis of obstructive jaundice, intrahepatic cholestasis, and pancreatitis.

Performing Laboratory

Hallmark Health

Physician Office Specimen Requirements

Container:  Serum gel tube(s)

Specimen:  1 mL of serum

Transport Temperature:  Refrigerate

Collection Instructions:  Avoid hemolysis.

Reference Values

Males:  18-61 U/L

Females:  5-36 U/L

Additional Information


Increased in patients on oral contraceptives. Elevated in patients on anticonvulsants and barbiturates.