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Also reported in: U/L
A normal ALP level means no significant obstruction of bile ducts, no bone disease driving ALP elevation, and no signs of infiltrative liver disease. ALP is particularly useful for detecting bile duct obstruction and cholestatic liver disease, and a normal level provides meaningful reassurance against these conditions.
Alkaline phosphatase is produced by the liver, bile ducts, bones, and intestines. A very low ALP can occur with hypothyroidism, pernicious anemia, zinc deficiency, or certain rare genetic conditions affecting bone metabolism. Very low ALP in isolation is rarely a sign of serious disease but may warrant investigation for these conditions.
Not typically notable. Discuss with your doctor if accompanied by other symptoms suggesting thyroid or bone disease.
ALP: {{value}} {{unit}} — very low (ref: {{low}}–{{high}})A low ALP can reflect low bone turnover, low zinc levels, or hypothyroidism in some individuals. It is less clinically concerning than elevated ALP. In healthy adults with no symptoms, low ALP is often a benign normal variant. Blood transfusions or cardiac bypass surgery can transiently lower ALP.
Generally not a clinical concern. Mention to your doctor if you have bone, thyroid, or nutritional concerns.
ALP: {{value}} {{unit}} — low (ref: {{low}}–{{high}})A borderline low ALP is within the lower portion of the reference range and is generally not clinically significant. Some individuals naturally have lower ALP levels based on bone density, dietary factors, and genetics. In the absence of other abnormal liver markers, this finding is typically benign.
No specific action needed in most cases. Maintain balanced zinc and overall nutritional intake.
ALP: {{value}} {{unit}} — borderline low (ref: {{low}}–{{high}})A normal ALP level means no significant obstruction of bile ducts, no bone disease driving ALP elevation, and no signs of infiltrative liver disease. ALP is particularly useful for detecting bile duct obstruction and cholestatic liver disease, and a normal level provides meaningful reassurance against these conditions.
Normal result. No action needed. ALP should be reviewed together with other liver enzymes for a complete picture.
ALP: {{value}} {{unit}} — normal (ref: {{low}}–{{high}})An optimal ALP in the mid-normal range indicates no bile duct obstruction, no significant bone disease, and normal liver function from a cholestatic standpoint. This is the ideal operating range for ALP, corresponding to healthy bile flow and normal liver architecture.
Excellent result. No action needed.
ALP: {{value}} {{unit}} — optimal (ref: 50–120)A borderline elevated ALP can reflect mild bile duct irritation, fatty liver disease, early cholestatic changes, normal bone healing after a fracture, or occasionally a normal variant during rapid growth in adolescents or late pregnancy. Without an elevated GGT, a bone source is more likely than a liver source.
Discuss with your doctor. GGT testing can help determine whether the elevation is from the liver/bile ducts or from bone. Review medications that can elevate ALP.
ALP: {{value}} {{unit}} — borderline elevated (ref: {{low}}–{{high}}; borderline: 147–200)A noticeably elevated ALP is a meaningful finding. When accompanied by elevated GGT, it strongly suggests a hepatobiliary source — bile duct obstruction from gallstones, primary biliary cholangitis, or liver infiltration by metastases or granulomas. When GGT is normal, bone disease (Paget's disease, bone metastases, healing fractures) is the more likely source.
Medical evaluation is needed. GGT, liver imaging (ultrasound or MRI), and bone markers may be ordered to identify the source and cause of elevation.
ALP: {{value}} {{unit}} — elevated (ref: {{low}}–{{high}}; elevated: >200)A very high ALP above 600 IU/L is a major finding requiring urgent investigation. This level is seen in noticeable bile duct obstruction (complete or near-complete), primary biliary cholangitis, hepatic infiltration by malignancy, noticeable Paget's disease, or widespread bone metastases. The underlying cause carries significant consequences if untreated.
Urgent medical evaluation is needed. Liver imaging, MRCP, and comprehensive hepatology assessment should be arranged without delay.
ALP: {{value}} {{unit}} — very high (ref: {{low}}–{{high}}; critical: >600)Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.