CRP (C-Reactive Protein)
CRP (C-reactive protein) is a protein produced by the liver that rises in response to inflammation. High-sensitivity CRP (hs-CRP) can detect lower levels and is used to assess cardiovascular disease…
Category: Inflammation & Immune
Also known as: crp, c-reactive protein, c reactive protein, hs-crp, hscrp, high sensitivity crp, high-sensitivity c-reactive protein, c reaktivni protein
Reference range: 0–3 mg/L (Source: ABIM)
Standard unit: mg/L
High values may indicate
High CRP levels may indicate acute infection, chronic inflammatory conditions (such as rheumatoid arthritis or inflammatory bowel disease), tissue injury, or increased cardiovascular disease risk.
Low values may indicate
Low CRP levels are normal and indicate minimal systemic inflammation. Levels below 1.0 mg/L are associated with low cardiovascular risk.
Frequently asked questions
- What is a normal CRP (C-Reactive Protein) level?
- A typical reference range for CRP (C-Reactive Protein) is 0–3 mg/L (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is CRP (C-Reactive Protein) measured in?
- CRP (C-Reactive Protein) is most commonly reported in mg/L. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do CRP (C-Reactive Protein) reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track CRP (C-Reactive Protein) over time?
- Yes. Upload results from any lab and BloodId charts your CRP (C-Reactive Protein) over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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