LabVals

All tests · Liver Function (LFTs)

Liver Function (LFTs)

Gamma-Glutamyl Transferase (GGT)

Normal range 8–61 U/L (0.13–1.02 µkat/L SI). Specimen: Serum.

Also known as: GGTP, gamma-GT.

8–61 U/LReference range

Reference range

ConventionalU/L
861
SIµkat/L
0.131.02
SpecimenSerum
Conventional range8–61 U/L
SI range0.13–1.02 µkat/L
Conversion factor×0.0167 (conventional → SI)
PanelLiver Function (LFTs)

Convert any Gamma-Glutamyl Transferase (GGT) result between units on the unit converter.

What is the normal range for Gamma-Glutamyl Transferase (GGT)?

The standard teaching reference range for Gamma-Glutamyl Transferase (GGT) is 8–61 U/L in conventional units, or 0.13–1.02 µkat/L in SI units. This value is measured in serum.

Source: Adult reference values compiled from Pagana & Pagana, Mosby's Diagnostic and Laboratory Test Reference, and Fischbach & Dunning, A Manual of Laboratory and Diagnostic Tests. Reference ranges vary by laboratory, method, age, sex, and population — always use the range printed on the actual result.

Above the range

Common causes of a high Gamma-Glutamyl Transferase (GGT)

  • Cholestasis / biliary disease
  • Alcohol use
  • Enzyme-inducing drugs
  • Fatty liver

At the bedside

Nursing considerations

  • A sensitive marker of biliary disease and alcohol use; confirms that a high ALP is hepatic.

Study aid

Your notes on Gamma-Glutamyl Transferase (GGT)

Same panel

More Liver Function (LFTs) tests

Alanine Aminotransferase (ALT)7–56 U/LAlbumin, Serum3.5–5 g/dLAlkaline Phosphatase (ALP)44–147 U/LAmmonia15–45 µg/dLAspartate Aminotransferase (AST)10–40 U/LBilirubin, Direct (Conjugated)0–0.3 mg/dL