Diabetomics has developed the first rapid point-of-care test for the autoimmune biomarker anti-citrullinated albumin (ACA). The ACA test compliments the current ACCP (anti-cyclic citrullinated peptide) diagnostic test. The test can use a non-invasive saliva sample or a fingerstick sample. The availability of this test will facilitate early clinical stratification of rheumatoid arthritis and the implementation of optimal interventions.