What is a normal LDH level?
The short answer
A typical US lab prints a normal LDH range of 140–280 U/L. That range exists to catch disease, not to describe your best.
Nobody we follow has said what your LDH should be. It comes up on the shows, but never with a number.
What LDH measures
An enzyme present in almost every tissue, released when cells break down.
It says cells are breaking down somewhere, without saying where. So it goes with more specific markers.
Checked against MedlinePlus — Lactate Dehydrogenase (LDH) Test.
Common questions
What is a normal LDH level?
Most US labs print 140–280 U/L. Your report grades you against that range. It exists to catch disease, not to describe your best.
What does your LDH number mean?
On a typical lab range, under 140 U/L is low, 140 to 280 is normal and over 280 is high. Your own report prints its range next to your number, and that is the one your lab uses. Nobody we follow has drawn a line inside that range.
What does the LDH test measure?
An enzyme present in almost every tissue, released when cells break down. It says cells are breaking down somewhere, without saying where. So it goes with more specific markers.
Why is there no target here?
Because nobody we follow has named a number for LDH. If that changes, it will be here.