TGM2 and celiac disease: In the present randomised clinical trial, Celiac disease Prevention with Probiotics (CiPP) study (15, 16), children with the persistence of tissue transglutaminase autoantibodies (tTGA), i.e., CD autoimmunity, received Lactiplantibacillus plantarum HEAL9 and Lacticaseibacillus paracasei 8700:2 probiotics, or placebo, for 6 months.