What Is GGT in a Blood Test?

Q: What Is GGT in a Blood Test?

GGT explained: normal 8-61 U/L, high GGT means alcohol use, bile duct obstruction, or liver disease. Most sensitive marker for alcohol-related liver injury.

GGT is found primarily in the liver and is the most sensitive marker for alcohol-related liver injury.

Normal Range

8–61 U/L

High GGT Causes

Alcohol use — even moderate
Bile duct obstruction
Fatty liver disease
Medications

GGT vs ALP

Both rise with bile duct obstruction
GGT is liver-specific; ALP also rises with bone disorders

Source: American Association for Clinical Chemistry, NLM MedlinePlus.

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