Elmi Laboratories

Alkaline phosphatase blood test

Normal Reference Range

0 – 0.5Yrs = 57 – 265U/L
0.5 – 10Yrs = 100 – 360U/L
10 – 17Yrs = 100 – 450U/L
>17 Yrs = 25 – 115U/L

Test Information

ALP is normally found everywhere, but it is most abundant in the tissues of the liver, bile ducts, bones, and intestines. Increased ALP turnover as a result of organ/tissue injury or increased production as a result of growth cycles (bone isoenzyme), pregnancy (placental isoenzyme), or metastasis are all associated with leakage into the vasculature. Both physiological and pathological factors can increase ALP.

Clinical Indications

• Vitamin D deficiency. Bone pain, for investigation of increased bone turnover (e.g., osteomalacia)
• Liver impairment
• Differential diagnosis: liver vs. bone causes (see ALP isoenzymes.) Consider also, GGT assay
• Chronic conditions with malabsorption which can lead to severe vitamin D deficiency

Sample Required

5mL serum sample tube is required for Alkaline phosphatase blood test

Min. sample volume


Special Instructions and Precautions

Not applicable

Time Limits For Retrospective Testing

Not applicable

Any factors affecting the test

Not applicable

Turnaround Time

3 hours

Referral centre (if applicable)

Not applicable

Test Code


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