“…Previous studies have already shown a positive association between air pollutants and insulin resistance in subjects with the GG genotype of the rapid acetylator phenotype rs1799930 NAT2 [37]. Another study also showed that T2DM patients with the rapid acetylator phenotype (carriers of the GG genotype) had significantly higher absolute insulin levels and lower insulin sensitivity compared with patients characterized by a slow acetylator phenotype [38].…”