TCF7L2 and type 2 diabetes mellitus: The systematic review by Dietrich et al. [20], in addition to the above findings, included a further study reporting an interaction between TCF7L2 rs7903146 and another TCF7L2 variant (rs12255372) and quintiles of cereal fiber intake on T2D incidence, showing that the magnitude of the association between TCF7L2 variants and T2D incidence was greater among individuals in the higher fiber intake quintiles than among those in the lower quintiles [144].