Alkaline Phosphatase Normal Range and Information
Understand alkaline phosphatase, its normal range, and what abnormal levels may indicate about liver, bone, or overall health. Learn about testing and interpretation.
Written by Dr. Dhankecha Mayank Dineshbhai
Reviewed by Dr. M L Ezhilarasan MBBS
Last updated on 27th Aug, 2025
Alkaline phosphatase (ALP) is an enzyme found in various tissues throughout the body, including the liver, bones, kidneys, and intestines. It plays a crucial role in breaking down proteins and supporting essential bodily functions. A simple blood test can measure ALP levels, helping doctors assess liver and bone health.
If you’ve recently had a blood test and are curious about your ALP levels, this article will help you understand what they mean, why they matter, and when you should seek medical advice.
What Is the Normal Range for Alkaline Phosphatase?
The normal range for alkaline phosphatase varies depending on age, gender, and overall health. Generally, the standard ranges are:
- Adults: 20–140 IU/L (International Units per Liter)
- Children & Adolescents: Higher levels (due to bone growth)
- Pregnant Women: Slightly elevated (due to placental ALP)
These values can differ slightly between labs, so always refer to the reference range provided in your test report.
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Why Is Alkaline Phosphatase Important?
ALP helps doctors detect potential health issues, particularly related to the liver and bones. Elevated or low levels may indicate underlying conditions that need further evaluation.
Common Reasons for Testing ALP Levels:
- Routine health check-ups
- Symptoms of liver disease (jaundice, fatigue, abdominal pain)
- Bone disorders (osteoporosis, fractures, bone pain)
- Monitoring treatment for liver or bone conditions
What Causes High Alkaline Phosphatase Levels?
Higher-than-normal ALP levels may suggest:
1. Liver Conditions:
- Hepatitis (liver inflammation)
- Cirrhosis (scarring of the liver)
- Bile duct obstruction (gallstones, tumors)
2. Bone Disorders:
- Paget’s disease (abnormal bone growth)
- Osteoporosis (weak bones)
- Bone fractures or healing
3. Other Causes:
- Pregnancy (due to placental ALP)
- Certain medications (antibiotics, anti-seizure drugs)
- Growth spurts in children
When to Worry?
If your ALP is significantly high and accompanied by symptoms like fatigue, jaundice (yellow skin/eyes), bone pain, or unexplained weight loss, consult a doctor for further tests.
What Causes Low Alkaline Phosphatase Levels?
Low ALP levels are less common but may occur due to:
- Malnutrition or vitamin deficiencies (zinc, magnesium, vitamin B6)
- Hypophosphatasia (a rare genetic disorder affecting bones and teeth)
- Chronic kidney disease
If your levels are unusually low, your doctor may recommend additional tests to determine the cause.
How Can You Maintain Healthy ALP Levels?
While some ALP fluctuations are normal, you can support liver and bone health with these lifestyle tips:
1. Eat a Balanced Diet
- Include foods rich in vitamin D (fatty fish, eggs, fortified milk) and calcium (dairy, leafy greens) for bone health.
- Consume antioxidant-rich foods (berries, nuts, green tea) to support liver function.
2. Exercise Regularly
- Weight-bearing exercises (walking, jogging, strength training) strengthen bones.
- Yoga and stretching improve flexibility and reduce bone stress.
3. Avoid Excessive Alcohol & Processed Foods
- Alcohol can damage the liver, raising ALP levels.
- High-sugar and fatty foods may contribute to liver stress.
4. Stay Hydrated
- Drinking enough water helps flush toxins and supports liver function.
5. Get Regular Check-ups
- Routine blood tests help monitor ALP levels and detect early signs of health issues.
When Should You See a Doctor?
Consult a healthcare provider if:
- Your ALP levels are significantly higher or lower than the normal range.
- You experience symptoms like fatigue, jaundice, bone pain, or swelling.
- You have a history of liver or bone disorders and need monitoring.
Your doctor may recommend additional tests (liver function tests, bone scans, or imaging) to determine the cause of abnormal ALP levels.
How Apollo 24|7 Can Help
If you’re concerned about your alkaline phosphatase levels or need a liver/bone health check-up, Apollo 24|7 offers:
- Easy Blood Testing – Book a test from home with quick results.
- Expert Consultations – Connect with specialists for personalized advice.
- Comprehensive Health Packages – Monitor liver and bone health with tailored screenings.
Final Thoughts
Alkaline phosphatase is an important enzyme that helps assess liver and bone health. While slight variations in ALP levels are normal, significant changes may require medical attention. By maintaining a healthy lifestyle and getting regular check-ups, you can keep your liver and bones in good shape. If you have any concerns about your ALP levels, don’t hesitate to reach out to a healthcare professional. Early detection and proper care can make a big difference in your long-term well-being.
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Consult a Top Specialist
Dr. Swathi Reddy Perugu
General Physician/ Internal Medicine Specialist
7 Years • MBBS, MD (General Medicine)
Hyderabad
Health plus, Hyderabad
Dr. Sandhya Chandel
General Physician/ Internal Medicine Specialist
16 Years • MBBS, MD (Int. Med.), IDCCM
Bilaspur
Apollo Hospitals Seepat Road, Bilaspur
(125+ Patients)
Dr. Ashita Kuruvilla
General Practitioner
6 Years • MBBS
Kolkata
KVC CLINIC, Kolkata
Dr. Harshendra Jaiswal
General Physician/ Internal Medicine Specialist
12 Years • MBBS , MD (General medicine)
Kolkata
108 DHANA DHANVANTARI Clinic, Kolkata
(25+ Patients)
Divyashree K
General Physician/ Internal Medicine Specialist
5 Years • MBBS
Bengaluru
Apollo Clinic, JP nagar, Bengaluru
