Also known as: Gamma-glutamylTranspeptidase; GGTP; Gamma GT; GTP
Formal name: Gamma-glutamylTransferase
Related tests: AST; ALT; ALP; Bilirubin; Liver panel ; Ethanol
To differentiate between liver and bone disease as a cause for elevated alkaline phosphatase (ALP); sometimes to help detect liver disease and/or alcohol abuse
When you have symptoms of a liver disorder or as follow up when you have an increased ALP level
A blood sample drawn from a vein in your arm
GGT levels fall after meals, so it is best to be tested when you have not eaten for at least 8 hours.