liver · GGT · GGTP
Gamma-Glutamyl Transferase
A liver and bile-duct enzyme that is especially sensitive to alcohol and certain medications. A high GGT alongside a high ALP points toward the bile-duct side of the liver rather than the muscle.
This page is general wellness education, not medical advice. Your own lab’s reference range and your clinician’s interpretation always take precedence.
Typical reference range
| Group | General range |
|---|---|
| Men | 8 – 61 U/L |
| Women | 5 – 36 U/L |
Units: U/L. Ranges vary by lab and assay — read yours against the range printed on your own report.
What high Gamma-Glutamyl Transferase can mean
- Alcohol
- Fatty liver
- Bile-duct obstruction
- Certain medications
- Smoking
What low Gamma-Glutamyl Transferase can mean
- Generally not clinically concerning