A primary upstream driver of hs-CRP and systemic inflammation — aging, obesity, and chronic disease all raise it.
IL-6 is a pleiotropic cytokine that drives the acute-phase response (hs-CRP is produced in response to IL-6 signaling in the liver). Chronically elevated IL-6 is one of the hallmarks of "inflammaging" — the low-grade inflammation that accompanies aging and predicts mortality independently of traditional risk factors.
It is produced by adipose tissue (why obesity raises baseline inflammation), activated immune cells, and muscle during exercise. Post-exercise elevations are beneficial; chronic baseline elevations are not.
IL-6 is influenced by: adiposity (visceral fat is a major producer), infection, autoimmune activity, exercise (acute rise, lower baseline over time), sleep deprivation, and pharmacologic blockers (tocilizumab in rheum practice). GLP-1s lower baseline IL-6 via weight loss and direct anti-inflammatory effects.
Not a standard lab — most users won't see it unless ordering a longevity-focused inflammation panel. When available, trend it alongside hs-CRP. Strong downward movement during a weight-loss or anti-inflammatory protocol is a meaningful biological signal.
Upload any lab PDF and MyProtocolStack maps your values to IL-6 and 40+ other biomarkers. StackAI interprets the trend in context of your protocol.
Start tracking →Informational only — not medical advice. Reference ranges vary by lab and individual context. Work with a licensed provider to interpret your specific results.