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Gamma-glutamyl transferase (GGT)

Gamma-glutamyl transferase (GGT) is an enzyme in the bile ducts and liver. The GGT level test can help diagnose different conditions in the liver.

A high GGT level in the blood shows a liver condition, but it doesn’t indicate the specific type like bile duct disease, cirrhosis or hepatitis. Generally, the more severe the liver impairment is, the higher the level of GGT. Other conditions that may cause higher GGT levels are diabetes, alcoholism, pancreatitis, heart failure and ingestion of certain medications.

A normal or low GGT level may indicate the person has not taken alcohol recently, and liver impairment is unlikely. Small amounts of alcohol can increase GGT levels, so the test is useful for monitoring alcoholism.

When combined with high alkaline phosphatase levels, high GGT levels can indicate liver impairment. A normal GGT level with a high alkaline phosphatase will likely indicate bone disease.

Certain medications like non-steroidal anti-inflammatory drugs (NSAIDs), Dilantin TM, phenobarbital and carbamazepine, and cholesterol medications can increase GGT levels.

At Private Blood Tests London, we offer a wide range of tests to check liver health, including the gamma-glutamyl transferase test. You can call us on 02071830244 to speak with our healthcare professionals for your GGT test.