What is a normal alkaline phosphatase level?
The short answer
A typical US lab prints a normal alkaline phosphatase range of 40–129 U/L. That range exists to catch disease, not to describe your best.
Nobody we follow has said what your Alkaline Phosphatase should be. It comes up on the shows, but never with a number.
What Alkaline Phosphatase measures
An enzyme found all over your body. Your liver, bile ducts and bones carry the most.
It rises when something blocks bile flow, or when bone rebuilds itself.
Checked against MedlinePlus — Alkaline Phosphatase.
Common questions
What is a normal Alkaline Phosphatase level?
Most US labs print 40–129 U/L. Your report grades you against that range. It exists to catch disease, not to describe your best.
What does your Alkaline Phosphatase number mean?
On a typical lab range, under 40 U/L is low, 40 to 129 is normal and over 129 is high. Your own report prints its range next to your number, and that is the one your lab uses. Nobody we follow has drawn a line inside that range.
What does the Alkaline Phosphatase test measure?
An enzyme found all over your body. Your liver, bile ducts and bones carry the most. It rises when something blocks bile flow, or when bone rebuilds itself.
Why is there no target here?
Because nobody we follow has named a number for Alkaline Phosphatase. If that changes, it will be here.