GGT (Gamma-Glutamyl Transferase): What Your Result Means
Result guide · Liver
Content last reviewed 2026-09-12 · Educational information — not medical advice
Quick answer
GGT is the biliary-disease and alcohol-sensitive enzyme. Its superpower is context-setting: elevated ALP with elevated GGT = liver; elevated ALP alone = bone. GGT also rises from many medications without disease.
What is GGT (Gamma-Glutamyl Transferase)?
Gamma-glutamyl transferase shuttles glutathione conjugates across membranes, concentrating in biliary epithelium. Extremely sensitive to alcohol and cholestasis — sensitivity being both virtue (screening) and vice (non-specificity: GGT alone elevated proves little).
Typical reference interval: Men <~60 U/L, women <~40 U/L, laboratory-dependent.. Laboratories differ — the interval printed on YOUR report always governs.
If your GGT (Gamma-Glutamyl Transferase) is high
Common reasons GGT (Gamma-Glutamyl Transferase) runs above the reference interval:
- Alcohol use — even moderate regular intake elevates — half-life weeks make GGT a decent sobriety-tracking biomarker
- Biliary obstruction and cholestatic diseases — with ALP
- Fatty liver disease — commonly accompanies NAFLD
- Medications — phenytoin, carbamazepine, barbiturates, NSAIDs, statins, antidepressants induce hepatically
- Diabetes, obesity, pancreatitis — metabolic associations
If your GGT (Gamma-Glutamyl Transferase) is low
Common reasons GGT (Gamma-Glutamyl Transferase) runs below the reference interval:
- Nothing pathological — isolated low GGT unremarkable
Symptoms worth knowing
None intrinsic. Its role is interpretive support for ALP elevations and alcohol-history corroboration.
What usually happens next
Get your GGT (Gamma-Glutamyl Transferase) checked
These lab tests measure GGT (Gamma-Glutamyl Transferase) directly. Ordering online takes a few minutes and results arrive securely.
We may earn a commission when you order through partner links on the following pages. Educational information here never replaces advice from a qualified healthcare provider.
Panels that include this value
GGT (Gamma-Glutamyl Transferase) appears as one line inside these broader panels — better value than ordering single markers alone:
Related result guides
Frequently asked questions about GGT (Gamma-Glutamyl Transferase) results
How long after quitting drinking does GGT normalize?
Weeks-to-months depending on duration/intensity of use. Persistence beyond ~3 months abstinence suggests another process.
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