Elmi Laboratories

Alkaline phosphatase isoenzymes Blood Test

Normal Reference Range

Liver/Biliary Fractions (L1, L2): = Approx.: 60% of Total
Bone Fraction (B): = Approx.: 30% of Total
Bone Fraction (B): = <50U/L
Intestinal Fractions (I1, I2, I3) and Placental Fractions (P1, P2) =
i.e. I1+I2+I3+P1+P2: = <10%*

Note: Placental fractions may be much higher if the subject is pregnant or malignancy present

Test Information

Causes of normal-to-elevated ALP levels include: cholestatis, biliary obstruction, bone disease, healing fractures, hepatitis, hyperparathyroidism, liver disease, osteoblastic bone cancers, osteomalacia, Paget's disease and Rickets.

Clinical Indications

• Elevated ALP and/or suspected liver/bone pathology
• Assessment of hyperparathyroidism
• Assessement of extent of bone loss to implement vitamin D supplementation in high risk cases eg. bariatric surgery patients

Sample Required

5mL serum sample tube is required for Alkaline phosphatase isoenzymes 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

Up to 4 days

Referral centre (if applicable)

Not applicable

Test Code


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