During this time of year when diet and exercise are a top priority, more and more people are grabbing a handful of walnuts. According to new research published in Food and Function, researchers from The University of Scranton in Scranton, Pa., compared the amount of powerful antioxidants called polyphenols in nine types of roasted and raw nuts and two types of peanut butter, in an attempt to "crack" the antioxidant code. The results? Walnuts are the valedictorian. Complete article