ABCG1 and type 2 diabetes mellitus: Although genome-wide association studies have not found any single nucleotide polymorphisms (SNPs) within or nearby ABCG1 associated with increased T2D risk, several EWAS have found that hypermethylation in the ABCG1 gene was associated with fasting glucose, HbA1C levels, lipid metabolism, fasting insulin, T2D risk and BMI [13–15, 33–36].