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C-Reactive Protein (CRP): normal range & what your result means

CRP is a protein that rises with inflammation anywhere in the body, so it is a quick, general marker of infection or inflammatory disease.

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Typical adult reference range

Measure	Range
Normal	< 10 mg/L
hs-CRP (low cardiac risk)	< 1 mg/L
hs-CRP (higher cardiac risk)	> 3 mg/L

What a HIGH result can mean

A high CRP indicates active inflammation or infection; very high suggests significant bacterial infection
Raised hs-CRP is linked to higher heart-disease risk

What a LOW result can mean

A low/normal CRP suggests little active inflammation

Ranges vary by lab. Reference ranges are TYPICAL ADULT values and vary by laboratory, age, sex, pregnancy and the method used. Always read your result against the range printed on YOUR report, and let your doctor interpret it alongside your history.

Frequently asked questions

What does a high CRP mean?

It signals inflammation somewhere — commonly infection, injury or an inflammatory condition. CRP shows that inflammation is present, not where, so it is read with your symptoms.

What is the difference between CRP and hs-CRP?

They measure the same protein; hs-CRP (high-sensitivity) detects small amounts used to assess cardiovascular risk, while standard CRP tracks infection/inflammation.

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MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.