Alkaline phosphatase (ALP) is an enzyme found in the liver, bones, kidneys, and digestive system. This test helps evaluate liver and bone health.
Category: Liver Function
Also known as: alp, alkaline phosphatase, alk phos, alkp
Reference range: 44–147 U/L (Source: ABIM)
Standard unit: U/L
High values may indicate
High ALP may indicate bile duct obstruction, liver disease, bone disorders such as Paget's disease, or hyperparathyroidism. It is also normally elevated in children and during pregnancy.
Low values may indicate
Low ALP may indicate malnutrition, celiac disease, hypothyroidism, or rare genetic conditions such as hypophosphatasia.