Patients with an established diagnose of IBD, DIA, IBS or RA is eligible for inclusion in this study. Patients must be over 18 years of age. Disease activity will be measured using the SCCAI for ulcerative colitis, SCDAI for Crohn's disease, DAS-28 for rheumatoid arthritis. In Dia and IBD objective activity measures, such as calprotectin in stools and HbA1C, will be collected.