A cup of cooked brown medium-grain rice will give you 154 mg of potassium, about 3% of the recommended daily value. This amount is much more than you'll get from its refined counterpart, white rice.
A slice of whole-wheat bread will provide 81 mg of potassium. Raisin bran and grape nuts have over 300 mg of potassium per cup. If you need to eat less potassium for health reasons, there are still plenty of grains to choose from, including oatmeal, bran flakes, and shredded wheat.

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