ALP

Understanding the marker

ALP is an enzyme found in the liver and bile ducts as well as bone. Other tests help establish which source may explain a change in its blood level.

ALP can originate from bile ducts or bone. Other liver tests, including GGT, and clinical context help identify the likely source. A result is interpreted against the relevant age- and method-specific laboratory interval.

What does high ALP mean?

A high ALP can come from the liver and bile system or from bone. GGT and other liver or bone-related tests help identify the pattern. Age and symptoms also affect interpretation.

What does low ALP mean?

Low ALP is less common than an elevation. A persistent low result is assessed with nutrition, relevant mineral tests and the reason for testing; one value does not identify a cause.