CRP is a marker for inflammation; which description is accurate?

• A. A marker for inflammation and disease (non-specific)
• B. A marker for liver function only
• C. A specific marker for a single disease
• D. A measure of oxidative stress

Answer: (A)

CRP rises in response to inflammation and tissue injury, making it a signal of systemic inflammatory activity rather than a diagnosis for a specific condition. This non-specific nature is what makes CRP useful: it indicates that inflammation or disease activity is present and can help track how well a patient responds to treatment or how an inflammatory process is changing over time. It is produced by the liver, but it is not a test of liver function itself. It also isn’t specific to one disease—many different inflammatory states can elevate CRP. It is not a marker of oxidative stress either, as that would be measured by different biomarkers.