What Is ALP in a Blood Test?

ALP is found in liver, bile ducts, bones, and placenta.

Normal Range

  • 44–147 U/L

High ALP (Liver)

  • Bile duct obstruction
  • Cholestatic disease
  • Cirrhosis

High ALP (Bone)

  • Paget’s disease
  • Bone cancer
  • Normal growth

Distinguishing Source

  • Check GGT: high GGT = liver source; normal GGT = bone source
Source: American Association for Clinical Chemistry, NLM MedlinePlus.

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