Mediki
GGT blood test: what your result means
GGT is a liver and bile duct enzyme. It helps interpret liver-related enzyme patterns, especially with ALP.
- Category
- Liver function
- Standard unit
- U/L
- Reported in
- U/L, IU/L, µkat/L, nkat/L
What does high GGT mean?
Higher values may suggest bile duct or liver stress. What counts as high depends on the reference range printed on your lab report, because ranges differ between laboratories.
What does low GGT mean?
Lower values are usually not clinically significant. What counts as low depends on the reference range printed on your lab report, because ranges differ between laboratories.
GGT units and conversion
Mediki shows GGT in U/L. Labs may report it in other units; Mediki converts them automatically so results from different labs line up on one chart.
IU/L is numerically the same as U/L, so no conversion is needed.
| Unit on your report | Convert to U/L | Convert back |
|---|---|---|
| µkat/L | 1 µkat/L = 60 U/L | 1 U/L = 0.01667 µkat/L |
| nkat/L | 1 nkat/L = 0.06 U/L | 1 U/L = 16.67 nkat/L |
Convert a value from your report with the blood test unit converter.
Why track GGT over time?
A single GGT result is a snapshot. Comparing it with your earlier tests shows whether a value is stable, slowly drifting, or responding to a change in treatment or lifestyle, which is often more useful than one number on its own.
Read our guide on how to read blood test results to understand reference ranges, flags and units.
Following GGT as part of a panel? See the liver function test tracker.
Track your GGT results in one chart
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Medical disclaimer: This page is general information, not medical advice. Reference ranges differ between laboratories, and only a doctor can interpret your results in the context of your health.