For example, we recently showed that the “C” allele of the nonsynonymous rs13266634 SNP in the SLC30A8 gene, which confers a gain of function in the ZnT8 zinc transporter, is associated not only with increased T2D risk and blood glucose, but also with increased risk for hemolytic anemia and decreased mean corpuscular hemoglobin (39). This evidence concerns the gene SLC30A8 and type 2 diabetes mellitus.