← All Biomarkers
GGT
Biliary enzyme; marker of oxidative stress and alcohol use
Also known as: Gamma-Glutamyl Transferase,GGTP
Reference Ranges
Clinical Reference
5.0 – 65.0 U/L
Optimal Range
5.0 – 30.0 U/L
Critical Range
> 300.0
U/L
Sensitive to alcohol and oxidative stress
Related Conditions
Liver Disease
High
Metabolic Syndrome
High
Food & Lifestyle Recommendations
🍎 Food
Reduce or eliminate alcohol; increase antioxidant-rich foods (berries, leafy greens, nuts)
GGT is very sensitive to alcohol intake
🏃 Exercise
Regular exercise reduces GGT and improves liver enzyme profiles in NAFLD
Exercise reduces liver fat independent of weight loss
Evidence-Backed Supplements
When High
-
Some evidence for GGT reduction in NAFLD
Silymarin extract (70–80%) 140–210 mg silymarin 2–3x/day With meals
Questions to Ask Your Doctor
- Could my elevated GGT indicate alcohol use, or is it a sign of oxidative stress? GGT is very sensitive to alcohol and NAFLD
Upload your blood test to see how your GGT compares to reference and optimal ranges.
Upload Blood Test