Acute phase reactants - CRP C-reactive protein (CRP) is produced by the liver. The level of CRP rises when there is inflammation in the body. It is one of a group of proteins, called acute phase reactants that go up in response to inflammation. The levels of acute phase reactants increase in response to certain inflammatory proteins called cytokines. These proteins are produced by white blood cells during inflammation.This article discusses the blood test done to measure the amount of CRP in your blood. Blood is drawn from a vein (venipuncture), usually from the inside of the elbow or the back of the hand. A needle is inserted into the vein, and the blood is collected in an air-tight vial or a syringe. Preparation may vary depending on the specific test. How the Test is Performed A blood sample is needed. This is most often taken from a vein. The procedure is called a venipuncture. How to Prepare for the Test No special steps are needed to prepare for this test. How the Test will Feel...
