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LDH Blood Test: What Does Lactate Dehydrogenase Tell You?
LDH is a general tissue damage marker that may be relevant during various life stages for women. Hormonal changes during the menstrual cycle, pregnancy, or menopause can occasionally influence LDH levels.
What It Measures
LDH is an enzyme involved in energy production within cells. It catalyses the conversion of lactate to pyruvate and is present in many tissues throughout the body.
This test measures the total concentration of LDH in your blood. When cells are damaged or destroyed, LDH is released into the bloodstream. Because it is found in so many tissues, elevated LDH is non-specific and is typically used alongside other markers to help identify the source of tissue damage.
Why It Matters
LDH serves as a general indicator of tissue damage. Elevated levels can be associated with conditions affecting the liver, heart, kidneys, lungs, muscles, or blood cells, including haemolytic anaemia and certain cancers.
While LDH alone cannot diagnose a specific condition, it is a valuable tool when used alongside other tests. Serial measurements may also help monitor disease progression or treatment response.
When to Test
LDH testing may be recommended when tissue damage is suspected but the source is unclear, or as part of a broader diagnostic workup. It is commonly included in liver panels and general health assessments.
Monitoring LDH over time may also be useful for tracking conditions such as anaemia, certain cancers, or organ damage following injury or illness.
Symptoms
Low Levels
High Levels
Shortness of breath
Nausea or loss of appetite
Muscle pain or cramping
Unexplained weight loss
Recommendations
Female
Low LDH is generally not concerning and usually does not require follow-up.
Elevated LDH may indicate tissue damage in the liver, heart, or other organs. Consider further evaluation to identify the source.
Lifestyle Tips
Because LDH is a non-specific marker, lifestyle recommendations depend on the underlying cause of elevation. In general, maintaining a healthy lifestyle with regular exercise, balanced nutrition, and adequate rest supports overall tissue health.
Avoid excessive physical exertion without adequate recovery, as intense exercise can temporarily elevate LDH. Stay hydrated and consult your healthcare provider if LDH levels remain persistently elevated to identify and address the underlying cause.