A rheumatoid factor test kit measures the amount of rheumatoid factor in your blood. Rheumatoid factors are proteins which the immune system produces. These proteins can attack healthy tissue in your body.
Often, high levels of rheumatoid factor in the blood indicate autoimmune diseases such as rheumatoid arthritis. However, some people with autoimmune diseases have normal levels of rheumatoid factor. It’s safe to use rheumatoid factor test kit
Rheumatoid factors (RF) are antibodies directed against antigenic sites in the Fc fragment of human and animal IgG. Their frequent occurrence in rheumatoid arthritis makes them useful for diagnosis and monitoring of the disease.