Amazing research shows that the correct answer is a chocolate bar–by a mile! In tests using the “gold standard” for measuring antioxidants–the ORAC test–chocolate actually comes out ahead of the former antioxidant champs: tea, Concord grape juice, and blueberries.(Reported at the Experimental Biology conference, Apr 2000)   Even so, save chocolate for an occasional healthy heart treat, says researcher Penny Kris-Etherton, PhD, RD, of Pennsylvania State University in State College. “Chocolate has a price tag–it’s loaded with calories. You’re not helping your heart one bit if you eat too much chocolate and end up gaining weight.”   For everyday healthy heart antioxidants, rely on low-calorie sources–fruits, vegetables, and tea. Or use cocoa powder (chocolate with much of the fat removed) to make hot chocolate.