Both groups of compounds, flavonoids and anthocyanins, are secondary plant metabolites that exhibit beneficial effects on human health. Hyperoside has been shown to possess various biological functions as a reactive oxygen species scavenger (ROS), such as preventing the free radical-induced oxidation of vitamin E in human low-density lipoprotein (Zesheng and others 2001). Other effects include increasing superoxide dismutase activity, an antidepressant-like activity through inhibition of nitric oxide synthase in rat blood and cerebral homogenate (Luoand others 2004), and the partial uncoupling of oxidative phosphorylation in cardiac mitochondria (Trumbeckaite and others 2006). For cyanidin, reported activities include cytoprotective effects against DNA damage that could be also correlated with the antioxidant activity (Choi and other 2007).