This ORAC test was conducted using Ocean Mist brand of artichokes. The amount of antioxidants in boiled preparation is almost the same as microwaved artichokes.
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