What can I eat at a fast-food restaurant if I'm on a kidney diet?

Eating at fast-food restaurants is not totally out of the question if you're on a kidney diet. It does, however, take some thought. While many fast-food items are presalted, you can ask that yours have the salt and/or extra condiments left off. This may take a few extra minutes of waiting time. French fries are high in potassium. You must know how much potassium you are allowed to consume if you choose this item. Unsalted onion rings would be a better choice. Choose a small non-cola soda rather than a milk shake or large soda. Many fast-food restaurants now have salad bars as an alternative.