The profile of plasma glucose levels during the oral glucose tolerance test (OGTT) was unchanged between the three KLF6_IVS1-27G>A genotype groups, depicted as homozygous variant (-○- AA), heterozygous variant (-●- GA) and wild type (-●- GG) (A). In contrast, the plasma insulin levels were lower, significantly so at 30 minutes, in the homozygous variant AA individuals (* = p<0.05) (B).