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Alkaline Phosphatase Isoenzyme Test - ALP Isoenzyme Test
Results and Values
What do the test results mean?
Normal values for ALP isoenzymes vary based on the age and sex of the person and the type of test used.
There are 4 main ALP isoenzymes: bone, liver, intestine and placenta. The placenta isoenzyme is usually only seen in pregnant women.
Determining which isoenzyme is elevated tells the healthcare provider which organ may be damaged. For example, if the bone isoenzyme is elevated, bone disease is suspected.