Alkaline Phosphatase (ALP)

Enzyme from liver, bone, intestine, and placenta. Rises in biliary obstruction or bone turnover.

Units

U/L

Reference (Male)

40 – 129 U/L

Reference (Female)

35 – 104 U/L

What it measures

Enzyme from liver, bone, intestine, and placenta. Rises in biliary obstruction or bone turnover.

What a high value can mean

Cholestasis, bile duct obstruction, bone disease (Paget's), growing children, pregnancy.

What a low value can mean

Zinc deficiency, hypothyroidism, malnutrition, Wilson's disease.

Conditions it helps assess

Biliary obstruction
Bone turnover

Reading these numbers in context

Reference ranges describe the central 95 % of a healthy reference population — 5 % of perfectly healthy people fall outside any given range by definition. A single mildly abnormal value is rarely meaningful on its own. blood-test.life always interprets values together with related biomarkers before flagging.

Related biomarkers in Liver Panel

Alanine Aminotransferase ALT Liver-specific enzyme released when hepatocytes are damaged. Aspartate Aminotransferase AST Found in liver, heart, and muscle. AST/ALT ratio (De Ritis) > 2 suggests alcoholic liver disease. Total Bilirubin TBIL Byproduct of red cell breakdown. Elevation causes jaundice.