In participants with T2DM, baseline GSH constituted a key biomarker for the prediction of executive and social functioning, in combination with pro-inflammatory CRP, red blood cell activity [hemoglobin (HGB) and hematocrit (HCT)], and with oxidative stress biomarkers [ROS and superoxide dismutase (SOD)] between 25.9 and 38.6% of the variance at TY was explained. This evidence concerns the gene CRP and type 2 diabetes mellitus.