Inflammation
CRP
LOINC 1988-5 · mg/dL
What it is
C-reactive protein (CRP) is made by the liver and rises quickly when there is inflammation anywhere in the body.
Why it matters
It is a sensitive, general marker of inflammation, useful for detecting and tracking infections and inflammatory conditions.
What high values can mean
A higher value indicates active inflammation, from infection, injury or an inflammatory condition.
What low values can mean
A lower value suggests little inflammation, which is what you want.
How to improve it
CRP follows the underlying cause; treating an infection or inflammatory condition brings it down.
Food & lifestyle
An anti-inflammatory lifestyle — not smoking, regular activity, balanced diet, healthy weight — supports lower baseline inflammation.
Preparing for the test
A blood test; fasting is not required — follow your lab's instructions.
When to talk to a doctor
A high CRP is interpreted by a doctor with your symptoms to find the source of inflammation.
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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