What is ALT a specific indicator of?

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Multiple Choice

What is ALT a specific indicator of?

ALT, or alanine aminotransferase, is an enzyme concentrated mainly in liver cells. When hepatocytes are damaged, ALT leaks into the bloodstream, so a rise in blood ALT levels reflects hepatocellular injury. Because ALT is relatively specific to the liver, it serves as a clear indicator of liver damage. In contrast, markers tied to other organs—kidney injury (creatinine), lung injury, or muscle injury (creatine kinase)—do not primarily reflect liver health.

ALT, or alanine aminotransferase, is an enzyme concentrated mainly in liver cells. When hepatocytes are damaged, ALT leaks into the bloodstream, so a rise in blood ALT levels reflects hepatocellular injury. Because ALT is relatively specific to the liver, it serves as a clear indicator of liver damage. In contrast, markers tied to other organs—kidney injury (creatinine), lung injury, or muscle injury (creatine kinase)—do not primarily reflect liver health.

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