C-reactive protein (CRP) in a blood test is a protein produced by the liver that increases in the bloodstream in response to inflammation. The CRP blood test measures the level of this protein to detect inflammation or infection in the body
. Key points about CRP in blood tests:
- CRP is an acute-phase protein made by the liver and released when there is inflammation or infection
- The test helps identify the presence and severity of inflammation but does not specify the location or cause
- High CRP levels can indicate infections, autoimmune diseases (like rheumatoid arthritis or lupus), inflammatory bowel disease, or other inflammatory conditions
- The test is also used to monitor how well a patient is responding to treatment for inflammatory conditions
- A special high-sensitivity CRP (hs-CRP) test can detect low levels of inflammation and assess the risk of heart disease
Normal CRP levels are usually low (often less than 3 mg/L), and elevated levels suggest inflammation or infection
. Very high CRP levels (e.g., over 300 mg/L) may indicate severe infection or inflammation
. In summary, the CRP blood test is a useful marker for detecting and monitoring inflammation in the body, though it does not pinpoint the exact cause or location of the inflammation
