L. reuteri has a positive effect on the incidence of diarrhea with no effect on respiratory illness in children (Weizman, Asli, & Alsheikh, 2005) and inhibits the onset of colitis in transgenic IL‐10 deficient mice (Madsen, Doyle, Jewell, Tavernini, & Fedorak, 1999). This evidence concerns the gene IL10 and colitis.