Brown Rice
Similar to bread, whole grain rice contains much more potassium than white rice. One cup of cooked brown rice contains 150 mg of phosphorus and 154 mg of potassium, but one cup of cooked white rice only has 69 mg of phosphorus and 54 mg of potassium. Some good substitutes for rice are buckwheat or couscous, since they have less phosphorus yet are still very nutritious.
Banana
While bananas are naturally low in sodium and high in potassium, one medium banana has 422 mg of potassium. If you eat a banana every day, it may start to become difficult to keep your potassium intake under your daily recommended value of 2,000 mg. To add onto this unfortunate news, many other tropical fruits also have high potassium levels. The good news is that pineapples contain a lot less potassium than other tropical fruits, so they are a suitable alternative.