LDH
LDH is an enzyme present in almost all cells (liver, heart, muscle, blood cells). When cells are damaged it leaks into the blood. It is very sensitive, but entirely nonspecific — on its own it does not tell which tissue is affected.
| Rating | Range | What it means |
|---|---|---|
| Good | below 250 U/L | Within range. |
| Worth improving | 250 – 350 U/L | Slightly elevated — nonspecific. |
| Talk to a doctor | 350 U/L and above | Elevated — interpret in context (cell breakdown); seek advice. |
Why it matters
Nonspecific; elevated with cell breakdown (blood/liver/muscle).
If it’s low
Low LDH has no clinical significance.
If it’s high
Elevated LDH indicates cell breakdown somewhere in the body — hemolysis, tissue injury, infection or (more rarely) a tumor. The context tells where from.
What to do
LDH is nonspecific — interpret it in the context of other tests and how you feel. An isolated mild rise is often harmless (also a sampling error/sample hemolysis).
Read together with
Haptoglobin · Bilirubin (total) · AST
This content is for information only and is not a substitute for medical advice. Talk to your doctor about your results.
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