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<span>Alkaline Phosphatase</span>
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<h1>Alkaline Phosphatase</h1>
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<section><div class="mp-content"><h2>What is an alkaline phosphatase test?</h2>
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<p>An alkaline phosphatase (ALP) test measures the amount of ALP in your blood. ALP is an enzyme, a protein that speeds up certain chemical reactions in your body. ALP is found in all your body tissues, but higher amounts can be found in your liver, bile ducts, and bones. Each part of your body makes a different type of ALP.</p>
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<p>Abnormal levels of ALP in your blood may be a sign of a wide range of health conditions, including <a data-tid="310" href="https://medlineplus.gov/liverdiseases.html">liver disease</a>, <a data-tid="170" href="https://medlineplus.gov/bonediseases.html">bone disorders</a>, and <a data-tid="5987" href="https://medlineplus.gov/chronickidneydisease.html">chronic kidney disease</a>. The amount of ALP released into your blood can be affected by liver damage, conditions that affect bone growth, and certain gastrointestinal diseases. But an alkaline phosphatase test alone can't identify the source of ALP in your blood, so other tests are usually needed to make a diagnosis.</p>
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<p>Other names: ALP, ALK, PHOS, Alkp, ALK PHOS</p></div>
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</section>
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<section><div class="mp-content"><h2>What is it used for?</h2>
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<p>An alkaline phosphatase test is often used to screen for or help diagnose diseases of the liver or bones. The test may also help diagnose or monitor other health conditions.</p></div>
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</section>
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<section><div class="mp-content"><h2>Why do I need an alkaline phosphatase test?</h2>
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<p>Your health care provider may order an alkaline phosphatase test as part of a <a data-tid="4751" href="https://medlineplus.gov/healthcheckup.html">routine checkup</a>. Many conditions may affect ALP levels, so the test is often done with other blood tests. These other tests can include a <a data-pid="6629" href="https://medlineplus.gov/lab-tests/comprehensive-metabolic-panel-cmp/">comprehensive metabolic panel</a> (CMP) or <a data-pid="6661" href="https://medlineplus.gov/lab-tests/liver-function-tests/">liver function tests</a>, which check how well your liver is working.</p>
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<p>An alkaline phosphatase test may also be ordered if you have symptoms of liver damage or a bone disorder.</p>
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<p>Symptoms of liver disease can include:</p>
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<ul>
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<li><a data-tid="489" href="https://medlineplus.gov/nauseaandvomiting.html">Nausea and vomiting</a></li>
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<li>Lack of appetite</li>
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<li><a data-tid="5324" href="https://medlineplus.gov/fatigue.html">Fatigue</a></li>
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<li>Weakness</li>
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<li><a data-tid="4452" href="https://medlineplus.gov/jaundice.html">Jaundice</a>, a condition that causes your skin and eyes to turn yellow</li>
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<li><a data-tid="1229" href="https://medlineplus.gov/edema.html">Swelling</a> and/or <a data-tid="3061" href="https://medlineplus.gov/abdominalpain.html">pain in your abdomen</a> (belly)</li>
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<li>Swelling in your ankles and legs</li>
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<li>Dark-colored urine (pee) and/or light-colored stool (poop)</li>
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<li>Frequent <a data-tid="3067" href="https://medlineplus.gov/itching.html">itching</a></li>
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</ul>
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<p>Symptoms of bone disorders can include:</p>
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<ul>
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<li>Bone pain</li>
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<li>Inflammation and <a data-tid="23" href="https://medlineplus.gov/arthritis.html">arthritis</a> in your joints</li>
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<li>Bones that are unusually shaped and/or too large</li>
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<li><a data-tid="257" href="https://medlineplus.gov/fractures.html">Broken bones</a></li>
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</ul></div>
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</section>
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<section><div class="mp-content"><h2>What happens during an alkaline phosphatase test?</h2>
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<p>An alkaline phosphatase test is a type of blood test. During the test, a health care professional will take a blood sample from a vein in your arm, using a small needle. After the needle is inserted, a small amount of blood will be collected into a test tube or vial. You may feel a little sting when the needle goes in or out. This usually takes less than five minutes.</p></div>
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</section>
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<section><div class="mp-content"><h2>Will I need to do anything to prepare for the test?</h2>
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<p>Your provider will let you know if there are any special instructions. An ALP test is usually ordered with other blood tests. You usually need to <a data-pid="858" href="https://medlineplus.gov/lab-tests/fasting-for-a-blood-test/">fast</a> (not eat or drink) for several hours before these tests.</p>
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<p>You may need to stop taking certain medicines before the test, so tell your provider about everything you take. But don't stop taking any medicines unless your provider tells you to.</p></div>
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</section>
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<section><div class="mp-content"><h2>Are there any risks to the test?</h2>
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<p>There is very little risk to having a blood test. You may have slight pain or bruising at the spot where the needle was put in, but most symptoms go away quickly.</p></div>
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</section>
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<section><div class="mp-content"><h2>What do the results mean?</h2>
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<p><strong>High alkaline phosphatase (ALP) levels</strong> may be a sign of a liver problem or a bone disorder. Liver problems and bone disorders create different types of ALP. But your ALP test results can't tell which type of ALP is high.</p>
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<p>If your test results show high ALP levels, your provider may order other tests to help figure out what's causing the problem. These tests may include:</p>
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<ul>
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<li><strong>An ALP isoenzyme test.</strong> This test can tell which part of your body is making the ALP. But this test may not be available everywhere.</li>
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<li><strong>Liver function tests.</strong> If the results of these tests are also high, then your high ALP level is likely from a problem in your liver.</li>
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</ul>
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<p><strong>High alkaline phosphatase levels from your liver</strong> may be a sign of:</p>
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<ul>
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<li>Blockages in your <a data-tid="3787" href="https://medlineplus.gov/bileductdiseases.html">bile ducts</a></li>
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<li><a data-tid="190" href="https://medlineplus.gov/cirrhosis.html">Cirrhosis</a></li>
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<li><a data-tid="109" href="https://medlineplus.gov/hepatitis.html">Hepatitis</a></li>
|
||
<li><a data-tid="298" href="https://medlineplus.gov/infectiousmononucleosis.html">Mononucleosis</a>, which can sometimes cause swelling in the liver</li>
|
||
</ul>
|
||
<p>If alkaline phosphatase levels are high and the results of liver tests are normal, the problem may be a bone disorder, such as <a data-tid="1607" href="https://medlineplus.gov/pagetsdiseaseofbone.html">Paget's disease of bone</a>. This disease makes your bones unusually large and weak, causing them to break more easily.</p>
|
||
<p><strong>Moderately high levels of ALP</strong> may be a sign of many different types of conditions, including:</p>
|
||
<ul>
|
||
<li><a data-tid="1262" href="https://medlineplus.gov/hodgkinlymphoma.html">Hodgkin lymphoma</a></li>
|
||
<li><a data-tid="199" href="https://medlineplus.gov/heartfailure.html">Heart failure</a></li>
|
||
<li>Certain infections</li>
|
||
</ul>
|
||
<p>It's possible to have higher than normal levels of ALP and not have a medical condition that needs treatment. Your provider will consider your symptoms, medical history, and other test results to make a diagnosis.</p>
|
||
<p><strong>Low levels of ALP</strong> are less common. They may be a sign of:</p>
|
||
<ul>
|
||
<li>Zinc deficiency</li>
|
||
<li>Protein deficiency</li>
|
||
<li><a data-tid="5461" href="https://medlineplus.gov/malnutrition.html">Malnutrition</a></li>
|
||
<li>Pernicious anemia</li>
|
||
<li><a data-tid="439" href="https://medlineplus.gov/thyroiddiseases.html">Thyroid disease</a></li>
|
||
<li><a data-tid="1691" href="https://medlineplus.gov/wilsondisease.html">Wilson disease</a></li>
|
||
<li><a data-pid="14855" href="https://medlineplus.gov/genetics/condition/hypophosphatasia/">Hypophosphatasia</a>, a rare genetic disease that affects bones and teeth</li>
|
||
</ul>
|
||
<p>Learn more about <a data-pid="806" href="https://medlineplus.gov/lab-tests/how-to-understand-your-lab-results/">laboratory tests, reference ranges, and understanding results</a>.</p></div>
|
||
</section>
|
||
|
||
<section><div class="mp-content"><h2>Is there anything else I need to know about the alkaline phosphatase test?</h2>
|
||
<p>Many things can affect ALP levels. For example:</p>
|
||
<ul>
|
||
<li>Pregnancy can cause higher than normal ALP levels.</li>
|
||
<li>Children and teens may have high levels of ALP because their bones are growing.</li>
|
||
<li><a data-tid="160" href="https://medlineplus.gov/birthcontrol.html">Birth control pills</a> and certain medicines may lower ALP levels, while other medicines can cause the levels to increase.</li>
|
||
<li>Eating a fatty meal before an alkaline phosphatase test may also cause a small increase in ALP.</li>
|
||
</ul>
|
||
<p>To learn what your results mean, talk with your provider.</p></div>
|
||
</section>
|
||
|
||
<section><div class="mp-refs mp-content"><h2>References</h2>
|
||
<ol>
|
||
<li>American Liver Foundation. [Internet]. New York: American Liver Foundation; c2014. Diagnosing Liver Disease - Liver Biopsy; [updated 2024 Jan 12; cited 2024 Aug 09]; [about 6 screens]. Available from: <a href="https://liverfoundation.org/for-patients/about-the-liver/diagnosing-liver-disease/" target="bibliowin">https://liverfoundation.org/for-patients/about-the-liver/diagnosing-liver-disease/</a></li>
|
||
<li>Centers for Disease Control and Prevention [Internet]. Atlanta: U.S. Department of Health and Human Services; About Infectious Mononucleosis (Mono); [reviewed 2024 May 09; cited 2024 Aug 09]; [about 2 screens]. Available from: <a href="https://www.cdc.gov/epstein-barr/about/mononucleosis.html" target="bibliowin">https://www.cdc.gov/epstein-barr/about/mononucleosis.html</a></li>
|
||
<li>Cleveland Clinic: Health Library: Diagnostics & Testing [Internet]. Cleveland (OH): Cleveland Clinic; c2024. Alkaline Phosphatase (ALP); [reviewed 2021 Nov 04; cited 2024 Aug 09]; [about 14 screens]. Available from: <a href="https://my.clevelandclinic.org/health/diagnostics/22029-alkaline-phosphatase-alp" target="bibliowin">https://my.clevelandclinic.org/health/diagnostics/22029-alkaline-phosphatase-alp</a></li>
|
||
<li>Cleveland Clinic: Health Library: Diagnostics & Testing [Internet]. Cleveland (OH): Cleveland Clinic; c2024. Blood Tests; [reviewed 2022 Dec 06; cited 2024 Aug 09]; [about 16 screens]. Available from: <a href="https://my.clevelandclinic.org/health/diagnostics/24508-blood-tests" target="bibliowin">https://my.clevelandclinic.org/health/diagnostics/24508-blood-tests</a></li>
|
||
<li>Correa Marquez RR. Hypophosphatasia (HPP) [updated 2023 June 05; cited 2024 Aug 9]. In Medscape: Drugs & Diseases: Pediatrics: Genetics and Metabolic Disease [Internet]. Atlanta (GA): WebMD LLC; c1994-2024. Available from: <a href="https://emedicine.medscape.com/article/945375-overview#showall" target="bibliowin">https://emedicine.medscape.com/article/945375-overview#showall</a></li>
|
||
<li>Immergluck J, Anilkumar AC. Wilson Disease. [Updated 2023 Aug 7; cited 2024 Aug 09]; [about 6 screens]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-. Available from: <a href="https://www.ncbi.nlm.nih.gov/books/NBK441990/" target="bibliowin">https://www.ncbi.nlm.nih.gov/books/NBK441990/</a></li>
|
||
<li>Johns Hopkins Medicine [Internet]. The Johns Hopkins University; c2024. Paget Disease of the Bone; [cited 2024 Aug 09]; [about 3 screens]. Available from: <a href="https://www.hopkinsmedicine.org/health/conditions-and-diseases/paget-disease-of-the-bone" target="bibliowin">https://www.hopkinsmedicine.org/health/conditions-and-diseases/paget-disease-of-the-bone</a></li>
|
||
<li>Josse RG, Hanley DA, Kendler D, Ste Marie LG, Adachi, JD, Brown J. Diagnosis and treatment of Paget disease of bone. Clin Invest Med [Internet] 2007 [cited 2024 Aug 09]; 30(5): E210-23. Available from: <a href="https://www.ncbi.nlm.nih.gov/pubmed/17892763/" target="bibliowin">https://www.ncbi.nlm.nih.gov/pubmed/17892763/</a></li>
|
||
<li>Labcorp [Internet]. Burlington (NC): Laboratory Corporation of America(r) Holdings; c2024. Patient Test Information: Alkaline Phosphatase; [cited 2024 Aug 09]; [about 6 screens]. Available from: <a href="https://www.labcorp.com/tests/001107/alkaline-phosphatase" target="bibliowin">https://www.labcorp.com/tests/001107/alkaline-phosphatase</a></li>
|
||
<li>Lowe D, Sanvictores T, John S. Alkaline Phosphatase. StatPearls Publishing [Internet]. Treasure Island (FL): [last update 2023 Oct 29; cited 2024 Aug 09]; [about 9 screens]. Available from: <a href="https://www.ncbi.nlm.nih.gov/books/NBK459201/" target="bibliowin">Hhttps://www.ncbi.nlm.nih.gov/books/NBK459201/</a></li>
|
||
<li>Mayo Clinic [Internet]. Mayo Foundation for Medical Education and Research; c1998-2024. Paget's disease of bone; [cited 2024 Aug 9]; [about 5 screens]. Available from: <a href="https://www.mayoclinic.org/diseases-conditions/pagets-disease-of-bone/symptoms-causes/syc-20350811" target="bibliowin">https://www.mayoclinic.org/diseases-conditions/pagets-disease-of-bone/symptoms-causes/syc-20350811</a></li>
|
||
<li>Merck Manual Professional Version [Internet]. Kenilworth (NJ): Merck & Co. Inc.; c2024. Laboratory Tests of the Liver and Gall Bladder; [revised 2023 Aug; cited 2024 Aug 09]; [about 11 screens]. Available from: <a href="https://www.merckmanuals.com/professional/hepatic-and-biliary-disorders/testing-for-hepatic-and-biliary-disorders/laboratory-tests-of-the-liver-and-gallbladder" target="bibliowin">https://www.merckmanuals.com/professional/hepatic-and-biliary-disorders/testing-for-hepatic-and-biliary-disorders/laboratory-tests-of-the-liver-and-gallbladder</a></li>
|
||
<li>Nemours KidsHealth [Internet]. Jacksonville (FL): The Nemours Foundation; c1995-2024. Getting a Blood Test; [reviewed 2021 Sep; cited 2024 Aug 09]; [about 4 screens]. Available from: <a href="https://kidshealth.org/en/parents/blood-tests.html" target="bibliowin">https://kidshealth.org/en/parents/blood-tests.html</a></li>
|
||
<li>National Institute of Arthritis and Musculoskeletal and Skin Diseases [Internet] Bethesda (MD): U.S. Department of Health and Human Services; Paget's Disease of Bone; [reviewed 2022 Sept; cited 2024 Aug 09]; [about 3 screens]. Available from: <a href="https://www.niams.nih.gov/health-topics/pagets-disease-bone" target="bibliowin">https://www.niams.nih.gov/health-topics/pagets-disease-bone</a></li>
|
||
<li>Pathology Tests Explained [Internet]. Alexandria (Australia): Australasian Association for Clinical Biochemistry and Laboratory Medicine; c2024. ALP (Alkaline Phosphatase0; [reviewed 2023 Jun 01; cited 2024 Aug 09]; [about 6 screens]. Available from: <a href="https://pathologytestsexplained.org.au/ptests.php?q=ALP%20(Alkaline%20Phosphatase)" target="bibliowin">https://pathologytestsexplained.org.au/ptests.php?q=ALP%20(Alkaline%20Phosphatase)</a></li>
|
||
<li>Testing.com [Internet]. Seattle (WA): OneCare Media; c2024. Alkaline Phosphatase (ALP) Test; [modified 2022 Nov 24; cited 2024 Aug 09]; [about 8 screens]. Available from: <a href="https://www.testing.com/tests/alkaline-phosphatase-alp/" target="bibliowin">https://www.testing.com/tests/alkaline-phosphatase-alp/</a></li>
|
||
</ol></div>
|
||
</section>
|
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<script type='application/ld+json'>{
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"@context": "http://schema.org",
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"@type": "MedicalWebPage",
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||
"headline": "Alkaline Phosphatase",
|
||
"description": "An alkaline phosphatase (ALP) test measures the amount of ALP in your blood. ALP is an enzyme, a protein that speeds up certain chemical reactions in your body. ALP is found in all your body tissues, but higher amounts can be found in your liver, bile ducts, and bones. Each part of your body makes a different type of ALP. Abnormal levels of ALP in your blood may be a sign of a wide range of health conditions, including liver disease, bone disorders, and chronic kidney disease. The amount of ALP released into your blood can be affected by liver damage, conditions that affect bone growth, and certain gastrointestinal diseases. But an alkaline phosphatase test alone can't identify the source of ALP in your blood, so other tests are usually needed to make a diagnosis. Other names: ALP, ALK, PHOS, Alkp, ALK PHOS",
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"url": "https://medlineplus.gov/lab-tests/alkaline-phosphatase/",
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