Lactate Dehydrogenase (LDH)
The Lactate Dehydrogenase (LDH) blood test measures the level of LDH, an enzyme found in almost all cells of the body. LDH plays an essential role in energy production by helping convert glucose into usable energy within cells, particularly when oxygen levels are low.
Because LDH is present in many different tissues — including the heart, liver, muscles, kidneys, lungs, brain, and red blood cells — it is released into the bloodstream whenever cells are damaged, stressed, or broken down. For this reason, LDH is considered a general marker of tissue damage rather than a disease-specific test.
Elevated LDH levels may be seen in a wide range of medical conditions. These include infections, inflammatory disorders, liver disease, muscle injury, heart conditions, lung disease, haemolysis (breakdown of red blood cells), and certain cancers. LDH levels may also rise after strenuous exercise or following recent illness.
Although LDH cannot pinpoint the exact cause of tissue damage on its own, it provides valuable supporting information when interpreted alongside other blood tests, imaging findings, and clinical symptoms. In many cases, LDH acts as an early indicator that further investigation is required.
LDH testing is commonly used to help assess disease severity and monitor progression or response to treatment. For example, falling LDH levels over time may indicate recovery or treatment effectiveness, while rising levels can suggest ongoing tissue injury or worsening disease activity.
In haematology, LDH is often used when investigating anaemia, haemolytic disorders, or abnormal blood counts. In oncology, LDH may be used as a general marker of tumour burden or cell turnover in certain cancers, although it is always interpreted in conjunction with other tests.
Because LDH is non-specific, a single abnormal result does not diagnose a condition. Instead, it signals the need to look more closely at potential sources of tissue stress or damage. Your clinician may request additional blood tests or imaging studies to identify the underlying cause.
- Price: £35
- Code: LDH
- TAT: 1 Working Day
- Sample Type: Blood
What is this test used for?
The LDH test is used to detect tissue damage, inflammation, or increased cell turnover in the body.
Who should consider this test?
This test may be appropriate for individuals with unexplained symptoms such as fatigue, fever, weight loss, muscle pain, or abnormal blood results.
What do the results mean?
Elevated LDH levels suggest ongoing tissue damage or inflammation. Normal levels make significant cell injury less likely. Results are interpreted alongside other investigations rather than in isolation.
Do I need to prepare the test?
No fasting or special preparation is required. However, strenuous exercise shortly before testing may influence results.
FAQs
When will I receive my results?
Results are usually available within the stated turnaround time.
Should I discuss my results with a doctor?
Yes, results should always be reviewed with a qualified healthcare professional.
Why Choose Marylebone Diagnostic Centre?
At Marylebone Diagnostic Centre, we provide fast and reliable blood testing with a strong focus on clarity and patient reassurance. Our experienced clinical team ensures careful sample collection and timely reporting.
We understand that non-specific test results can feel confusing, which is why we focus on explaining what LDH can — and cannot — tell you about your health.
Book Now
Take a proactive step towards understanding possible tissue damage or inflammation by booking your Lactate Dehydrogenase (LDH) test with Marylebone Diagnostic Centre today.
