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C-reactive protein (CRP) is a substance produced by the liver in response to inflammation. Other names for CRP are high-sensitivity C-reactive protein (hs-CRP) and ultra-sensitive C-reactive protein (us-CRP). A high level of CRP in the blood is a marker of inflammation. It can be caused by a wide variety of conditions, from infection to cancer.What causes high C reactive protein levels?
High CRP levels may be due to infection, inflammatory bowel disease, cancer, lupus, pneumonia, rheumatoid arthritis, tuberculosis, heart attack or connective tissue disease. A positive result may also be the result of something as innocuous as pregnancy or the use of oral contraceptives. .What is the normal range of C reactive protein?
The median normal concentration of C-reactive protein is 0.8 mg/L, with 90% of apparently healthy individuals having a value less than 3 mg/L and 99% less than 12 mg/L. Elevated values are abnormal and suggest the presence of organic disease, although minimal C-reactive protein rises can be seen with obesity.