Among the fruits, vegetables and nuts analyzed, each food was measured for antioxidant concentration as well as antioxidant capacity per serving size. Cranberries, blueberries, and blackberries ranked highest among the fruits studied. Beans, artichokes and Russet potatoes were tops among the vegetables. Pecans, walnuts and hazelnuts ranked highest in the nut category.
Although spices are generally consumed in small amounts, many are high in antioxidants. On the basis of antioxidant concentration, ground cloves, ground cinnamon and oregano were the highest among the spices studied (fra http://hdlighthouse.org/treatment-care/care/hdltriad/diet/updates/1116antioxidant.php :)
Rank Food Serving Size Total Antioxidant Capacity per serving size
1 Small Red Bean 1/2 cup dried beans 13727
2 Wild blueberry 1 cup 13427
3 Red kidney bean 1/2 cup dried beans 13259
4 Pinto bean 1/2 cup 11864
5 Blueberry 1 cup cultivated berries 9019
6 Cranberry 1 cup whole berries 8983
7 Artichoke hearts 1 cupcooked 7904
8 Blackberry 1 cup 7701
9 Prune 1/2 cup 7291
10 Raspberry 1 cup 6058
11 Strawberry 1 cup 5938
12 Red Delicious apple 1 5900
13 Granny Smith 1 5381
14 Pecan 1 ounce 5095
15 Sweet cherry 1 cup 4873
16 Black plum 1 4844
17 Russet potato 1 cooked 4649
18 Black bean 1/2 cupdried beans 4181
19 Plum 1 4118
20 Gala apple 1 3903