Interleukin-6 (IL-6) is a messenger protein that drives inflammation.
- Normal range (adults)
- Up to 7 pg/mL (up to 7 ng/L)
- Sample
- Blood
- Fasting
- Not usually needed
- Also called
- Interleukin 6, Interleukin-6, IL6, Serum IL-6
Interleukin-6 normal range
| Group | pg/mLConventional units: US, South Asia | ng/LSI units: UK, Europe, Australia, international |
|---|---|---|
| Adults | Up to 7 | Up to 7 |
Your report may use either unit system; labs in the Gulf often print both. Ranges also vary slightly between laboratories, so the range printed on your own report is the one to go by.
Why is the Interleukin-6 test done?
It is mainly used in hospitals for severe infection and some inflammatory conditions.
What does a high Interleukin-6 level mean?
A high IL-6 indicates strong inflammation.
Common causes
- Severe infections, including COVID-19
- Autoimmune disease
- Major surgery or trauma
Diet and lifestyle tips
- Follow medical treatment
When should you see a doctor?
Results are interpreted by the treating team.
Last updated
This page is for general education and is not a diagnosis. Normal ranges differ between laboratories, so always compare your result with the reference range printed on your own report, and discuss abnormal results with your doctor.