Oxidative stress results in oxidative alteration of biological macromolecules such as lipids, proteins
and nucleic acids. It is considered to play a pivotal role in the pathogenesis of aging and degenerative
diseases [1-3]. In order to cope with an excess of free radicals produced upon oxidative stress, human
bodies have developed sophisticated mechanisms for maintaining redox homeostasis. These protective
mechanisms include scavenging or detoxification of reactive oxygen species (ROS), blocking ROS
production, sequestration of transition metals, as well as enzymatic and nonenzymatic antioxidant
defenses produced in the body, that is, endogenous [4,5], and others supplied with the diet, namely,
exogenous ones. Among them, dietary polyphenols have been widely studied for their strong
antioxidant capacities and other properties by which cell functions are regulated [6,7].