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Organ Function
GGT
Gamma-glutamyl transferase — a liver and bile duct enzyme that also reflects oxidative stress.
Optimal Range
< 25 U/L (optimal) · < 50 U/L (lab range)
Why It Matters
GGT is a marker of oxidative stress and glutathione depletion beyond just liver health. Elevated GGT independently predicts cardiovascular disease, diabetes, and all-cause mortality.