Parameter Included: 1








ALT plays an important role in amino acid metabolism. It catalyzes the transfer of an amino group from alanine to α-ketoglutarate, producing pyruvate and glutamate. This reaction is essential for energy production and normal liver function.
ALT is commonly measured in blood tests as a marker of liver health.
Elevated ALT levels usually indicate liver cell injury or inflammation, such as:
Hepatitis (viral, alcoholic, or drug-induced)
Fatty liver disease
Liver cirrhosis
Because ALT is more specific to the liver than many other enzymes, it is widely used to assess liver damage.
Typically 7–56 U/L (may vary depending on the laboratory).
In short, ALT is a key liver enzyme used clinically to evaluate liver function and damage.