Alkaline Phosphatase Test
An enzyme present in liver, bone, and bile ducts. Used to evaluate liver and bone health.
What is Alkaline Phosphatase?
An enzyme present in liver, bone, and bile ducts. Used to evaluate liver and bone health.
Alkaline Phosphatase Reference Range
These are the typical adult reference ranges used by major US labs. Your report will include the specific range used by the lab that processed your sample.
| Population | Range |
|---|---|
| age 18+ | 40.0 – 129 U/L |
Reference ranges are educational. Always interpret your result with the specific range printed on your lab report and discuss anything outside the range with a clinician.
What your Alkaline Phosphatase result may mean
Often reflects bile-flow problems, liver disease, or bone turnover (including normal growth in adolescents).
Can reflect malnutrition, low zinc, or rare genetic conditions.
Educational only — not a diagnosis. Many factors can influence a single result. Discuss anything that concerns you with a healthcare provider.
Sources
Frequently asked
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