What is this test?
Interleukin-6 is a signaling protein of the immune system that can rise rapidly during inflammation, infection, or tissue damage.
Why might it be ordered?
- As a supporting marker in a severe or complex inflammatory condition.
- For follow-up in a specialized clinical protocol when its modification may be useful.
What sample is needed?
A healthcare professional collects a venous blood sample. Depending on the method, the laboratory uses serum or plasma.
How should you prepare?
Tell the laboratory about all medicines, hormone treatments, vitamins and supplements you take. Do not stop or change treatment unless your clinician tells you to. Follow any instructions about fasting and the time of collection.
How should you understand the result?
Elevation indicates an activated inflammatory response, but does not indicate the specific cause or location. Your result is interpreted using the reference interval on the laboratory report and in the context of your symptoms, medical history and other test findings.
Sources and editorial status
This patient-facing text is an editorial draft. It should be approved by a laboratory physician before official publication.