GSTM1 and metabolic syndrome: In women without MetS, variables showing a significant difference in the distribution and the mean value in vitamin D status were age (p<0.001), AST (p<0.001), ALT (p<0.001), Fe (p<0.001), TIBC (p<0.001), TFS (p<0.001), Hb (p<0.001), Hct (p<0.001), and ferritin (p<0.001).