Interleukin 6
Measures a protein (cytokine) produced during inflammatory immune responses.
Why This Biomarker Matters
IL-6 is a marker of systemic inflammation linked to infection, autoimmune disease, and cardiovascular risk. Elevated levels guide anti-inflammatory treatment decisions.
Optimal Ranges
Clinician-defined 4-point reference thresholds (pg/mL)
Default Range
Overview
Interleukin 6 (IL-6) is a signaling protein (cytokine) produced by immune cells and tissues in response to inflammation or infection. Elevated IL-6 levels indicate systemic inflammation and are associated with various conditions including infections, rheumatoid arthritis, cardiovascular disease, and cancer. IL-6 is also elevated during acute stress and can indicate recovery status after surgery or illness. Measuring IL-6 helps assess inflammation severity and monitor treatment response in inflammatory conditions.
Research & Evidence
100 publications
Research data from MEDLINE/PubMed · 100 articles
Technical Information (LOINC Codes)
Standardized laboratory codes for this biomarker
26881-3Primary44322-649732-149919-4Available Lab Tests
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