Potassium helps the nerves and muscles to work properly. Your kidneys help regulate the amount of potassium in your body. Increased levels of potassium in the body can be dangerous. So once kidney failure exists, a person must be aware of foods that contain increased levels of potassium.
Foods that contain high levels of potassium: chocolate, coffee, bananas, oranges, potatoes, cantaloupe, tomatoes, prunes, mushrooms, raisins, greens, Swiss chard, dried fruit and nuts, apricots, bran, and salt substitutes. Foods low in potassium: apples, beans, rice, grapes, cucumbers, pear, onions, watermelon, lettuce, cranberries, carrots, cherries, cereals, noodles, and bread products.
All listed foods contain potassium so it is important to monitor portion size.