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    Lactic Acid Dehydrogenase (LDH)

    Lactic Acid Dehydrogenase (LDH)

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    Exam Overview

    Lactic acid dehydrogenase (LDH) is an enzyme that helps produce energy. It is present in almost all of the tissues in the body and its levels rise in response to cell damage. LDH levels are measured from a sample of blood taken from a vein.

    Why It Is Done

    LDH levels help diagnose lung disease, lymphoma , anemia , and liver disease. They also help determine how well chemotherapy is working during treatment for lymphoma.


    Lactic acid dehydrogenase (LDH) is an enzyme that helps produce energy. Results may vary widely from lab to lab.

    Normal LDH levels range from 140 units per liter (U/L) to 280 U/L or 2.34 mkat/L to 4.68 mkat/L.

    What To Think About

    Many diseases can cause increases in LDH levels. Other tests are usually needed to confirm a diagnosis.

    Complete the medical test information form (PDF) (What is a PDF document?) to help you prepare for this test.


    ByHealthwise Staff
    Primary Medical Reviewer Anne C. Poinier, MD - Internal Medicine
    Specialist Medical Reviewer Douglas A. Stewart, MD - Medical Oncology

    Current as ofOctober 14, 2016

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