Alkaline Phosphatase (ALP) in Dehradun

What is a Alkaline Phosphatase (ALP)?

Alkaline Phosphatase comes from two main places, and telling them apart is the whole art of interpreting it. In the liver it lines the small bile ducts, so it rises when bile flow is obstructed, whether by a gallstone, a stricture or a mass. In bone it is produced by the cells that build new bone, so it rises whenever bone turnover increases. That dual origin means a raised ALP alone does not say which organ is involved, and the answer usually comes from the company it keeps: a rise alongside GGT and bilirubin points to the biliary tract, while a rise with abnormal calcium or vitamin D points to bone. It is also the one liver enzyme with large, entirely normal physiological variation. Growing children and adolescents run levels several times the adult range because their bones are actively lengthening, and ALP rises substantially in the third trimester of pregnancy because the placenta produces its own form. Reading a child's or a pregnant woman's ALP against an adult reference range is a common and avoidable error.

Why take this test?

An ALP test is advised for yellowing of the eyes or skin, itching without a rash, pale stools and dark urine, or pain in the upper right abdomen, all of which suggest bile flow may be obstructed. It is equally indicated for bone symptoms: persistent bone pain, unexplained fractures, or a suspected disorder of bone turnover. It is a routine component of the liver function panel, so most people encounter it as part of a full-body checkup rather than as a standalone request, and it is often the value that prompts further investigation when the transaminases are normal. Doctors also use it to monitor known biliary or bone disease over time, and it is checked alongside calcium, phosphorus and vitamin D whenever bone health is the question.

• Yellow eyes or skin, itching, pale stools or dark urine
• Pain in the upper right abdomen or suspected gallstones
• Persistent bone pain or unexplained fractures
• An abnormal liver function panel needing follow-up
• Bone-health assessment with calcium, phosphorus and vitamin D
• Monitoring known biliary or bone disease

Normal reference ranges

Ranges are indicative for adults. Your report carries the lab-specific reference range and is reviewed by a LabONE pathologist; always interpret results with your doctor.

FAQs: Alkaline Phosphatase (ALP) in Dehradun