Gamma Glutamyl Transferase (GGT)

Gamma-Glutamyl Transferase (GGT) is an enzyme found mainly in the liver and bile ducts. Elevated levels are sensitive indicators of liver disease (especially cholestasis and alcohol-related damage) but are not entirely specific, as levels can also rise with other conditions or medications. GGT is also linked to oxidative stress and may be an independent risk marker for cardiovascular and metabolic disease.