C-Reactive Protein (CRP) is an inflammatory marker produced by the liver in response to infection, tissue injury, or chronic inflammatory diseases. The CRP test measures the concentration of this protein in the blood to help detect infections, inflammatory disorders, and cardiovascular risks. 

Clinical Applications:

Diagnosis of acute and chronic inflammation: High CRP levels indicate inflammation due to bacterial or viral infections, autoimmune diseases (e.g., rheumatoid arthritis, lupus), or inflammatory bowel disease (IBD).

Cardiovascular risk assessment: The hs-CRP test is used to predict heart disease risk, as persistent low-grade inflammation is linked to arterial damage and plaque buildup.

Monitoring treatment response: CRP levels are often measured to track the effectiveness of antibiotics, anti-inflammatory drugs, or lifestyle changes in reducing inflammation.

CRP is a nonspecific marker, meaning it does not pinpoint the exact cause of inflammation. Elevated CRP levels should be interpreted alongside other clinical findings and tests.