The United Stated Department of Agriculture has put together a list of the 20 foods with the highest concentration of antioxidants :
Small red beans
Wild blueberries
Red Kidney beans
Pinto beans
Cultivated Blueberries
Cranberries
Artichokes
Blackberries
Prunes
Raspberries
Strawberries
Red Delicious & Granny Smith apples
Pecans
Sweet cherries
Black plums
Russet potatoes
Black beans
Plums
Gala apples
Walnuts
Small red beans
Wild blueberries
Red Kidney beans
Pinto beans
Cultivated Blueberries
Cranberries
Artichokes
Blackberries
Prunes
Raspberries
Strawberries
Red Delicious & Granny Smith apples
Pecans
Sweet cherries
Black plums
Russet potatoes
Black beans
Plums
Gala apples
Walnuts