Gamma GT (gamma-glutamyl transferase) is an enzyme mainly found in the liver, and its level in the blood is used as part of a liver function assessment. When gamma GT levels are elevated, it can indicate some form of liver or bile duct issue; when they are normal or low, liver function is generally more favorable, though interpretation always depends on the full clinical context and other tests. Here’s a concise overview to address your terms:

• gamma: In this context, gamma refers to gamma-glutamyl transferase (GGT), an enzyme involved in amino acid transport and glutathione metabolism, with levels used to assess liver and biliary tract health.
• gt: Abbreviation for glutamyl transferase, i.e., GGT.
• c'est quoi: “C’est quoi?” French for “What is it?” — so you’re asking what Gamma GT is and what its values mean.

What Gamma GT tests measure

• A blood test measures the amount of GGT in the bloodstream to evaluate liver function and detect bile duct problems. Abnormal results prompt further investigation to determine the cause. This is commonly ordered as part of a liver panel or hepatic workup.

Typical interpretation

• Normal range varies by lab and method, but generally:
  • Men: roughly 10–45 UI/L
  • Women: roughly 7–35 UI/L
  • Children similar to adult female ranges
• Elevated GGT can indicate liver disease, alcohol-related liver damage, bile duct obstruction, certain medications, or other hepatic or biliary conditions.
• Very high levels are associated with more significant liver injury, but exact interpretation depends on the pattern with other enzymes such as ALT, AST, ALP, and bilirubin.

Important caveats

• GGT is a sensitive but not specific marker. Elevations can occur with alcohol use, medication effects, pancreatic or kidney disease, and some metabolic conditions. A single mildly elevated value often requires repeat testing and correlation with symptoms and other liver tests.

• Normal GGT does not completely rule out liver disease, especially in early or non-hepatic conditions; clinical context is essential.

If you want, I can tailor this to your language or provide a simple, translated explanation in French or another language, and include practical steps for discussing results with a clinician.