hs-CRP: The Inflammation Marker Explained
Updated June 2026
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Last updated: June 2026 - Reviewed by the Apexzen editorial team
Part of: Blood Biomarkers Guide
What is hs-CRP? C-reactive protein is made by the liver and rises when there is inflammation anywhere in the body. A standard CRP test flags larger swings, such as during an infection. The high-sensitivity test, hs-CRP, detects the smaller, lower-grade inflammation that some clinicians use to help estimate cardiovascular risk. Because CRP is not specific to one cause, it is always interpreted in context, not on its own.
Optimal and reference range
The figures below are typical lab reference ranges, which vary by lab and individual. Your own report's range is the one that counts. Discuss your results with your doctor or clinician.
| hs-CRP category | Typical value | Units |
|---|---|---|
| Lower relative risk | below 1.0 | mg/L |
| Average relative risk | 1.0 to 3.0 | mg/L |
| Higher relative risk (per doctor) | above 3.0 | mg/L |
Ranges vary by lab and individual; discuss your results with your doctor.
What affects hs-CRP and what helps
Many of the same habits that support heart health are associated with lower inflammation, under a clinician's guidance:
- Stay physically active most days and work toward a weight your doctor recommends.
- Favor a diet rich in vegetables, fruit, whole grains, legumes, nuts, and fish.
- Avoid smoking, which is strongly linked to higher inflammation.
- Manage related conditions such as diabetes and high blood pressure with your clinician.
Because a recent cold, injury, or flare-up can raise CRP, your doctor may wait until you are well before reading too much into a single high result.
When to talk to your doctor
See your doctor if your hs-CRP is high on more than one test, especially if you also have other heart risk factors such as high cholesterol, high blood pressure, or a family history of heart disease. Your clinician can rule out temporary causes, look at the full picture, and decide whether lifestyle changes or further evaluation are appropriate.
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Take the QuizFrequently asked questions
What does a CRP blood test show?
It measures inflammation in the body. A standard CRP flags larger inflammation such as infection, while hs-CRP detects lower-grade inflammation used to help assess heart risk. It does not point to a single cause on its own.
Why was my CRP high after being sick?
A recent infection, injury, or flare-up can temporarily raise CRP. That is why doctors often recheck a high hs-CRP once you have recovered.
Can a supplement lower inflammation markers?
No supplement reliably lowers hs-CRP, and chasing the number is not the goal. Focus on the lifestyle steps above and discuss a persistently high result with your doctor.
Related reading: ApoB: The Cholesterol Particle Number That Matters and Blood Biomarkers Guide.
Sources: American Heart Association (AHA); National Institutes of Health (NIH) - C-reactive protein and cardiovascular risk guidance.
This article is for educational purposes only and is not medical advice. These statements have not been evaluated by the Food and Drug Administration. Apexzen products are not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare provider before changing your diet, supplements, or treatment.