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§ Biomarker · inflammation

hs-CRP 2.5 mg/L — the inflammation reading that predicts cardiovascular events

inflammation·2 min read·reviewed 2026-05-07

High-sensitivity C-reactive protein (hs-CRP) at 2.5 mg/L places you squarely in the 'intermediate cardiovascular risk' band that the AHA / CDC categorisation defines (low <1.0, intermediate 1.0–3.0, high >3.0 mg/L). hs-CRP integrates systemic inflammatory tone over the past few days, and the cardiology research literature — most prominently the JUPITER trial and several subsequent cohorts — has consistently shown hs-CRP to be an independent predictor of cardiovascular events even after adjusting for traditional risk factors. The standard interpretation: hs-CRP doesn't tell you what's inflamed, just that something is.

Reference ranges

Optimal (low CV risk)< 1.0 mg/L
Intermediate CV risk1.0 – 3.0 mg/L
High CV risk> 3.0 mg/L
Acute inflammation / infection> 10 mg/L

What this marker measures

C-reactive protein is an acute-phase pentameric protein produced by the liver in response to IL-6 signalling. Standard CRP assays measure 1–10 mg/L poorly — they're designed for the much higher levels seen in acute infection. High-sensitivity (hs-)CRP assays measure down to ~0.1 mg/L and are used specifically for cardiovascular risk stratification at the low / chronic end of the inflammation spectrum. Because hs-CRP is downstream of any inflammatory stimulus, it's a non-specific marker — atherosclerosis, periodontal disease, IBD, autoimmune flare, viral illness, post-exercise inflammation, and visceral adiposity all push it up.

Why might it be elevated?

  • ·Atherosclerosis / endothelial inflammation
  • ·Visceral adiposity (adipose tissue secretes IL-6)
  • ·Insulin resistance and metabolic syndrome
  • ·Autoimmune disease (rheumatoid, lupus, IBD)
  • ·Periodontal disease
  • ·Acute or chronic infection
  • ·Recent intense exercise (transient — 24-48 h)
  • ·Smoking
  • ·Sleep deprivation
  • ·Post-surgical or post-traumatic

Why might it be low?

  • ·Healthy baseline — no clinical concern
  • ·Aspirin, statins, omega-3, lifestyle (exercise, weight loss) all lower hs-CRP modestly

FAQ

Is hs-CRP 2.5 dangerous?+

Not on its own. It's a risk modifier — meaning it raises your absolute cardiovascular risk relative to your other markers (lipids, blood pressure, glucose). The research literature shows hs-CRP is a stronger independent predictor than many traditional markers. The actionable response is to address the modifiable inflammatory drivers (visceral fat, sleep, periodontal hygiene, processed food intake) rather than treating hs-CRP itself.

When should I retest?+

Don't take a single hs-CRP at face value. Retest 2–4 weeks later in a non-illness, non-post-exercise state. The acute-phase response means a recent cold, dental work, or hard training session can transiently raise hs-CRP 5-10× baseline. Two readings 2 weeks apart, both in a 'clean' state, gives a much more reliable read.

What lowers it most reliably?+

Visceral fat reduction is the single most reliable lever in trials — even 5-10% body weight loss meaningfully reduces hs-CRP. Statins reduce hs-CRP independently of LDL effects (a finding from JUPITER). High-dose omega-3 (~2-4g EPA+DHA), Mediterranean-style diet, and resistance training all show modest reductions. Single-marker chasing tends to disappoint; addressing the underlying drivers consolidates progress.

Disclaimer

This page describes biomarker research and reference ranges for self-tracking and research-context discussion only. It is not medical advice, not a diagnosis, and not a substitute for a qualified physician. Take any concerns about your health to a clinician.

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