Cilantro spice has demonstrated many interesting properties, including antibacterial effects as suggested in numerous studies. More research is needed on those claims but we can confirm that cilantro has a high ORAC value and therefore, is a good source of antioxidants.
ORAC Source
USDA Database for the Oxygen Radical Absorbance Capacity (ORAC) of Selected Foods, Release 2 - Prepared by Nutrient Data Laboratory, Beltsville Human Nutrition Research Center (BHNRC), Agricultural Research Service (ARS), U.S. Department of Agriculture (USDA) - May 2010