Cereal grains are good sources of antioxidants. Most of the antioxidants in cereal grains are contained in the bran and germ. For instance, for the cereal products in the table below, whole-grain-wheat- and oat-based products had on average higher antioxidant content than products from refined rice or corn ingredients. Regardless, all breakfast cereals are good sources of antioxidants, comparable to common fruits and vegetables.

Antioxidant Content of Breakfast Cereals

 

Antioxidant Sources	Antioxidant Content (µmoles TE/100 grams)
Multi-Bran Chex®	3900
Basic 4®	3600
Crispy Wheaties ’N Raisins®2	3500
Raisin Nut Bran®	3100
Wheat Chex®2	3000
Whole Grain Total®2	2800
Wheaties®2	2800
Multigrain Cheerios®2	2700
Oatmeal Crisp/Raisin®2	2700
Apple Cinnamon Cheerios®	2700
Cheerios®2	2600
Honey Nut Cheerios®	2200
Oatmeal Crisp/Apple Cinnamon®2	2200
Country Corn Flakes®	2000
Corn Chex®	1600
Kix®	1400
Rice Chex®	1300

More lists of food sources high in antioxidants :
Cereals grains
Fruits, vegetables, nuts
Vegetables
Fruits -I
Fruits - II
Black and green tea, wine, coffee
Dark chocolate and other cocoa products

All products were about one month old when analyzed. All the products are General Mills brand. TE = Trolox Equivalents.

² Whole grain product.

Reference:

Harold E. Miller, Fred Rigelhof, Leonard Marquart, Aruna Prakash, and Mitch Kanter. 2000. Antioxidant Content of Whole Grain Breakfast Cereals, Fruits and Vegetables. Journal of the American College of Nutrition, Vol. 19, No. 90003, 312S-319S.