hs-CRP Test: Inflammation, Heart Risk, and How to Interpret It
High-sensitivity C-reactive protein, or hs-CRP, measures low-grade inflammation in the body. Large studies link higher hs-CRP levels with a greater risk of cardiovascular events, even when cholesterol is normal. The test is not specific: infections, injuries, and inflammatory conditions can all raise it, so results are best interpreted alongside a lipid panel and your overall risk. A walk-in lab can add hs-CRP to a routine draw. This guide explains what the test measures and the limits of its interpretation.
Key Takeaways
- hs-CRP measures low-grade inflammation and is associated with cardiovascular risk.
- It is a risk marker, not a diagnosis, and is interpreted alongside cholesterol and clinical history.
- Acute infection, injury, and inflammatory disease can temporarily raise hs-CRP.
- Higher values generally indicate more inflammation, but there is no universal treatment threshold.
- A single hs-CRP result should be confirmed on a repeat test when it is used for risk assessment.
Frequently Asked Questions
What is a normal hs-CRP level?
Many labs categorize risk as low below about 1 mg/L, average around 1 to 3 mg/L, and higher above about 3 mg/L, but thresholds vary and must be read with your clinical context.
Does a high hs-CRP mean I will have a heart attack?
No. It indicates more inflammation and a statistically higher risk, not a certainty. Your provider will consider cholesterol, blood pressure, diabetes, and other factors.
Can infection raise hs-CRP?
Yes. Recent infection, injury, or an inflammatory condition can raise hs-CRP, so the test is best done when you are well.
Do I need to fast for hs-CRP?
Fasting is generally not required, but if it is part of a lipid or glucose panel, follow that panel's preparation instructions.
Sources
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