Furthermore, a recent probiotic study showed that the administration of Lactobacillus rhamnosus GG can increase the serum tryptophan levels in kids with T1D, which in turn lowers the production of the inflammatory cytokines (IFN-γ, IL-17F) that is associated with the auto-immune response in PBMCs [189]. The gene discussed is IL17F; the disease is type 1 diabetes mellitus.