As previously mentioned, a starting point for future research is represented by the transformation of the design of this study from a cross-sectional to a prospective model, which could assess the time-dependent interaction between glycemic levels and the presence of anemia or the effect of low levels of Hb and the presence of chronic degenerative complications of T2D or its comorbidities. This evidence concerns the gene GSTM1 and anemia (phenotype).