Serum gamma-glutamyltransferase, gamma-glutamyl transpeptidase, GGT, SGGT.

To assist in diagnosing and monitoring liver disease.

Patient Preparation
There are no food, fluid, activity, or medication restrictions unless by medical direction.

Normal Findings
Method: Enzymatic spectrophotometry.

AgeConventional and SI Units
Newborn–6 mo12–122 units/L
7 mo and older
  Male8–60 units/L
  Female6–46 units/L
Normal ranges/Values may vary based on method and instrumentation. Values may be elevated in older adults due to the effects of medications and the presence of multiple chronic or acute diseases with or without muted symptoms.

Critical Findings and Potential Interventions

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