RSR is a  developer and manufacturer of medical diagnostics with particular emphasis on autoimmune thyroid disease, type 1 diabetes mellitus, neuroimmunology and adrenal autoimmunity. These products are concerned with detection and measurement of various autoantibodies and as such are used in disease diagnosis and management. RSR has an extensive research programme which includes identifying new autoantigens and autoantibodies, understanding the nature of the interaction between autoantigens and autoantibodies and using this information to establish and commercialise new assay methods.