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

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