Glycemic control: CoQ10 significantly reduced hemoglobin A1C (HbA1c, WMD = -0.22%; 95% CI: -0.37, -0.06; p = 0.006), fasting glucose (WMD = -10.07 mg/dL; 95% CI: -14.75, -5.39; p < 0.001), fasting insulin (FINS, WMD = -2.94 μIU/mL; 95% CI: -4.63, -1.25; p = 0.001), and homeostasis model assessment-insulin resistance (HOMA-IR, WMD = -0.82; 95% CI: -1.36, -0.28; p = 0.003). This evidence concerns the gene INS and Insulin resistance.