Rheumatoid Factor (RF) Test Kit

A Rheumatoid Factor (RF) Test Kit is an in-vitro diagnostic tool used to detect or measure the presence of rheumatoid factor—an autoantibody most commonly of the IgM class—in human blood (serum or plasma). RF antibodies target the Fc portion of IgG antibodies.

These kits are typically used as an aid in the diagnosis of rheumatoid arthritis (RA) and other autoimmune conditions, but they are not diagnostic by themselves.