Whole grains pack a powerful antioxidant punch along with their well-known fiber muscle, according to a new study.

For the first time, researchers have measured the total antioxidant content of many popular breakfast cereals and whole-grain snacks, and it turns out that the fiber powerhouses are also heavyweights in the cancer-fighting antioxidant division as well.

Raisin Bran and popcorn topped the list, but the study shows that many other popular whole-grain breakfast cereals and snacks may be an overlooked source of healthy antioxidants known as polyphenols.

Popcorn, Cereal Pack Antioxidant Punch.