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C-Reactive Protein, Quantitative

Published: July 27, 2026Updated: August 25, 2026

C-Reactive Protein (CRP) is a protein produced by the liver in response to inflammation. It is a key biomarker used to assess the presence and severity of inflammatory conditions.

Quick summary

CRP is a blood test marker that indicates inflammation levels in the body.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 25, 2026Editorial policy

Key facts at a glance

Units
mg/L
Clinical utility
screening
Result kind
quantitative
FDA-cleared
Roche CRP, Abbott CRP, Siemens CRP
interpretation: {"text":"0–3 mg/L: Indicates a typical level of inflammation.","label":"Normal"}; {"text":">3 mg/L: Suggests the presence of inflammation, infection, or chronic disease.","label":"Elevated"}

C-Reactive Protein (CRP) is a non-specific inflammatory marker that increases in response to acute inflammation, infection, and tissue injury. It is widely used in clinical settings to monitor inflammatory states and assess treatment response.

The quantitative CRP test measures the exact concentration of CRP in the blood, typically in milligrams per liter (mg/L). A higher than normal CRP level can indicate inflammation but does not specify where the inflammation is or what is causing it.

In screening contexts, a CRP level between 0–3 mg/L is generally considered normal. Levels above this range may warrant further investigation to identify the underlying cause of inflammation.

Frequently asked questions

What does a high CRP level mean?
A high CRP level indicates inflammation in the body, which can be due to infections, autoimmune disorders, or other inflammatory conditions.
Can CRP levels be lowered?
Yes, treating the underlying cause of inflammation, such as through medication or lifestyle changes, can help lower CRP levels.
  1. 1
    C-Reactive Protein (CRP) TestSource
  2. 2
    Understanding C-Reactive ProteinSource

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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy