Enzymes Associated with Liver Function

The main enzymes tested to assess liver function are:

1. Alanine Aminotransferase (ALT / SGPT) – Normal: 7–56 U/L

2. Aspartate Aminotransferase (AST / SGOT) – Normal: 5–40 U/L

3. Alkaline Phosphatase (ALP) – Normal: 44–147 U/L

4. Gamma-Glutamyl Transferase (GGT) – Normal: 9–48 U/L

Note:

• ALT & AST ↑ → Hepatocellular injury (e.g., hepatitis)

• ALP & GGT ↑ → Cholestasis / bile duct obstruction