Which liver enzyme is typically the first to increase in chronic alcoholism?

Which liver enzyme is typically the first to increase in chronic alcoholism?

• A. GGT
• B. AST
• C. ALT
• D. ALP

Answer: (A)

In alcohol-related liver effects, the body first shows changes in enzymes that reflect enzyme induction and biliary system involvement rather than outright hepatocyte injury. Gamma-glutamyl transferase (GGT) rises early because it responds to chronic alcohol exposure by increasing microsomal enzyme activity in the liver. This makes GGT a sensitive early marker of drinking, even before significant hepatocellular damage is evident. In contrast, AST and ALT indicate hepatocyte injury and usually rise later, with AST often disproportionately higher than ALT in alcoholic liver disease. ALP elevation points more to cholestasis or biliary issues rather than the initial alcohol effect. So the earliest enzyme to increase with chronic alcoholism is GGT.

In alcohol-related liver effects, the body first shows changes in enzymes that reflect enzyme induction and biliary system involvement rather than outright hepatocyte injury. Gamma-glutamyl transferase (GGT) rises early because it responds to chronic alcohol exposure by increasing microsomal enzyme activity in the liver. This makes GGT a sensitive early marker of drinking, even before significant hepatocellular damage is evident. In contrast, AST and ALT indicate hepatocyte injury and usually rise later, with AST often disproportionately higher than ALT in alcoholic liver disease. ALP elevation points more to cholestasis or biliary issues rather than the initial alcohol effect. So the earliest enzyme to increase with chronic alcoholism is GGT.