An LDH (Lactate Dehydrogenase) test measures this enzyme found in nearly all body tissues. LDH is released when cells are damaged, making it a general marker of tissue injury.
What This Test Measures
Lactate Dehydrogenase (LDH):
An enzyme involved in energy production, found in heart, liver, kidneys, muscles, lungs, and red blood cells. When any of these tissues are damaged, LDH is released into the bloodstream.
Reference Range
Normal: 140-280 U/L (varies by laboratory)
Who Should Consider This Test
• Evaluating tissue damage of unknown source
• Monitoring cancer treatment response
• Evaluating hemolytic anemia (red blood cell destruction)
• Liver disease assessment
• Monitoring certain infections
• Evaluating muscle damage
What Elevated LDH May Indicate
LDH is nonspecific – elevation indicates tissue damage but not which tissue. Causes include:
• Heart attack
• Hemolytic anemia
• Liver disease
• Muscle injury
• Kidney disease
• Certain cancers (lymphoma, leukemia)
• Infections (mononucleosis, pneumonia)
• Pulmonary embolism
LDH Isoenzymes
LDH exists in 5 forms (isoenzymes) specific to different tissues. If needed, isoenzyme testing can help identify the source of elevation.
How It Works
1. Order your test online – no doctor visit required
2. Visit any Quest Diagnostics location nationwide
3. Simple blood draw takes approximately 5 minutes
4. Results delivered to your secure portal within 1-2 business days
Preparation
No fasting required. Avoid strenuous exercise before testing as it can elevate LDH.
Related Tests to Consider
• Liver Function Panel – If liver source suspected
• CBC – If hemolytic anemia suspected
• Cardiac markers – If heart attack suspected
• CK – If muscle damage suspected
Why Choose Wittmer Rejuvenation Clinic
At $15, our LDH test is affordably priced. We partner with Quest Diagnostics for reliable, CLIA-certified laboratory testing.
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