The CYP24A1 gene was investigated in relation to T1D susceptibility: sixteen tag SNPs for CYP24A1 that were analyzed by Bailey et al. (2007) [91] as well as two further SNPs (rs6013897 and rs2296241) did not show any association with T1D [57,89]. This evidence concerns the gene CYP24A1 and type 1 diabetes mellitus.