Phenolic compounds and flavonoids are effective antioxidants (Vermerris and Nicholson, 2006). The protective effects of phenolic compounds and flavonoids are directly related to their ability to scavenge free radicals (Fraga, 2010).Free radicals can be harmful if they are present in an unprotected body (Dasgupta and De, 2004).Phenols undergo oxidation, producing toxic compounds, which elicit inhibitory effects on pathogenic microorganisms (Vermerris and Nicholson, 2006).