Mediki
Creatine kinase (CK) blood test: what your result means
CK measures an enzyme mostly from muscle tissue. It rises when muscle cells are injured or heavily stressed.
- Standard unit
- U/L
- Reported in
- U/L, IU/L, µkat/L
What does high creatine kinase (CK) mean?
Higher values may suggest muscle stress, injury, or increased muscle breakdown. What counts as high depends on the reference range printed on your lab report, because ranges differ between laboratories.
What does low creatine kinase (CK) mean?
Lower values are usually not clinically significant by themselves. What counts as low depends on the reference range printed on your lab report, because ranges differ between laboratories.
Creatine kinase (CK) units and conversion
Mediki shows creatine kinase (CK) in U/L. Labs may report it in other units; Mediki converts them automatically so results from different labs line up on one chart.
IU/L is numerically the same as U/L, so no conversion is needed.
| Unit on your report | Convert to U/L | Convert back |
|---|---|---|
| µkat/L | 1 µkat/L = 59.88 U/L | 1 U/L = 0.0167 µkat/L |
Convert a value from your report with the blood test unit converter.
Why track creatine kinase (CK) over time?
A single creatine kinase (CK) result is a snapshot. Comparing it with your earlier tests shows whether a value is stable, slowly drifting, or responding to a change in treatment or lifestyle, which is often more useful than one number on its own.
Read our guide on how to read blood test results to understand reference ranges, flags and units.
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Medical disclaimer: This page is general information, not medical advice. Reference ranges differ between laboratories, and only a doctor can interpret your results in the context of your health.