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Alkaline Phosphatase (ALP)

Clinical Biochemistry

Sample and container requirements

Serum Lithium Heparin Plasma (paediatrics only)

Minimum volume required

Special requirements

None

Patient preparation

None

Sample viability

Turnaround time

This assay is run throughout the day and night. The in-lab turnaround time is normally less than 24 hours. The test can be ordered as an urgent request.

Reference range

Neonates (<4 weeks): 70 – 380 U/L 4 weeks – 16 years: 60 – 425 U/L Adults: 30 – 130 U/L. (Source: Pathology Harmony Recommendations)

Clinical guidance

Alkaline phosphatase (ALP) is included in both the liver function test profile and bone profile. Please refer to LabTestsOnlineUK to learn more about ALP. https://labtestsonline.org.uk/tests/alkaline-phosphatase-alp-test

Notes

Images to go here

This information was last updated on 19 August 2026