Fasting Required: No
Specimen: Blood
Results: 1-3 Business Days
Description: This blood test checks for an amino acid called citrulline which is present when you have rheumatoid arthritis (RA). RA attacks your joints and Citrulline is a byproduct of joint damage. In response, your body often makes antibodies against citrulline. These antibodies are called anti-cyclic citrullinated peptide, or anti-CCP antibodies.