“…Meanwhile, reactive oxygen species (ROS) and free radical-mediated oxidative stress are generated, which may cause various diseases, such as cancer (Valko, Rhodes, Moncol, Izakovic, & Mazur, 2006), Alzheimer's disease (Butterfield, Drake, Pocernich, & Castegna, 2001), cardiovascular diseases (Middleton, Kandaswami, & Theoharides, 2000), and diabetes mellitus (DM) (Giovannini, Piaggi, Federico, & Scarpato, 2014). Growing evidence has indicated that there is a relationship between oxidative stress and DM (Li, Shen, & Meng, 2013;Yang, Jin, Lam, & Yan, 2011). DM is one of the leading causes of death, which has threatened mankind for centuries.…”