The awareness of harmful effects of free radicals for humanhealth has recently increased. Free radicals are very unstablemolecules arising physiologically during cellular aerobic metabolism (∼2-3% of oxygen consumed by a cell is convertedinto free radicals) (1). They react quickly with other compounds,beginning chain reactions. Once the process is started, it cancascade, finally resulting in disruption of a living cell or inmolecular and cellular DNA damage (2). Normally, the humanbody can handle these compounds, but if their amount becomesexcessive, damage can occur. Free radicals have been indicatedas probable pathogenesis determinants of many degenerativeand chronic diseases that develop with age, such as cancer,cardiovascular disease, cataract, and immunity system dysfunctions (2). For their potential role in preventing such diseases,natural compounds with antioxidant activity have gained theattention of researchers and nutritionists. Estimation of theantioxidant activity is becoming, in fact, an evaluation parameterfor the nutritional quality of food.