Blood Sciences Test

Alkaline Phosphatase (ALP) Isoenzymes



Special Instructions

Samples will only be referred if the alkaline phosphatase is above age and gender normal reference range

Test Usage

Assessment of other laboratory tests and the clinical picture will usually explain elevations of ALP without resorting to isoenzyme fractionation, which usually provides a clear-cut answer only when the answer is already obvious. A useful generalisation is that where both ALP and GGT are raised, liver is the source. When GGT is normal, a raised ALP is probably from bone.

Turnaround time

10 days


Referred test.  Can be added on to an existing request up to 4 days following sample receipt.


Please note this test is not UKAS accredited

Specimen Labelling Procedure