Inflammation
High-Sensitivity CRP
LOINC 30522-7 · mg/dL
Ranges
Reference range: ≤ 0.3 mg/dLOptimal range: ≤ 0.1 mg/dL
What it is
High-sensitivity CRP measures very low levels of C-reactive protein, fine enough to gauge the low-grade inflammation linked to heart risk.
Why it matters
It is used to refine cardiovascular risk, since chronic low-level inflammation contributes to artery disease.
What high values can mean
A higher value suggests more low-grade inflammation and a somewhat higher cardiovascular risk.
What low values can mean
A lower value suggests little inflammation, which is favourable for heart health.
How to improve it
Not smoking, regular activity, a healthy weight and an anti-inflammatory diet can lower hs-CRP over time.
Food & lifestyle
Vegetables, fruit, whole grains, fish and olive oil support lower inflammation; processed foods and excess weight raise it.
Preparing for the test
A blood test; fasting is not required, but avoid testing during an active infection — follow your lab.
When to talk to a doctor
Discuss your hs-CRP with a doctor as one part of your overall cardiovascular risk.
Related markers
Sources
- MedlinePlus (NIH)
- Testing.com (AACC)
Content reviewed on June 26, 2026
Medical disclaimer
This content is for educational purposes only. It is not medical advice and does not diagnose, treat, or prevent any condition. Reference ranges vary between laboratories — always use the range printed on your report and discuss your results with a healthcare professional.
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