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Answer · biomarkers

What causes elevated hs-CRP?

Short answer

Persistently elevated hs-CRP reflects low-grade systemic inflammation. Common drivers include visceral adiposity, insulin resistance, periodontal disease, sleep apnea, autoimmune activity, smoking, and recent infection. Interpretation always controls for acute illness.

Reviewed by Dr. Laura PurdyMay 29, 2026

Full answer

hs-CRP is a sensitive marker of low-grade systemic inflammation produced by the liver in response to circulating IL-6. A single elevated reading can reflect a recent infection, recent vaccination, intense exercise, or acute injury — so persistent elevation across two separated draws is what is interpreted in cardiovascular and metabolic context. Common chronic drivers include visceral adiposity, insulin resistance, periodontal disease, untreated sleep apnea, autoimmune activity, chronic infection, smoking, and ongoing psychological stress. Provider review pairs hs-CRP with ApoB, lipids, fasting insulin, A1c, and clinical context before assigning weight to it. A persistently elevated hs-CRP in a patient with otherwise reasonable lipids frequently changes the optimization plan.

Educational. Not a substitute for individualized provider review.

References & sources
  • hs-CRP — Primary source · oMeds
  • Reviewed by Dr. Laura Purdy, MD, MBA · Clinical Director, oMeds · Last reviewed 2026-05-29

Related answers

What is hs-CRP?
hs-CRP (high-sensitivity C-reactive protein) is a sensitive marker of low-grade systemic inflammation produced by the liver. Elevated hs-CRP independently predicts cardiovascular events, correlates with metabolic and visceral-fat patterns, and is read alongside lipids and ApoB.
What is ApoB?
ApoB (apolipoprotein B) counts every atherogenic lipoprotein particle in the bloodstream. It is a stronger predictor of cardiovascular events than LDL cholesterol alone because it counts particles, not cargo. Modern cardiometabolic optimization treats ApoB as the primary lipid endpoint.
What is insulin resistance?
Insulin resistance is a state where cells respond poorly to insulin, so the pancreas secretes more insulin to maintain normal blood glucose. It precedes type-2 diabetes by years and shows up first in fasting insulin, HOMA-IR, triglyceride/HDL ratio, and ApoB before A1C or fasting glucose drift. It is reversible.
hs-CRP vs ESR?
For cardiovascular and metabolic context, hs-CRP is the more informative and reproducible marker. ESR is older, less specific, and more useful for tracking certain rheumatologic and infectious conditions over time. They answer different clinical questions.
Primary source
hs-CRP