It takes a lot of awareness to eat a low-salt diet, but you can do it. In restaurants, soups often contain a lot of salt: Avoid them. Many restaurants use too much salt: Request less. Read labels carefully. To increase potassium, eat more fresh fruits, vegetables, nuts, and seeds. Foods that are high in potassium include bananas, oranges, avocados, tomatoes, broccoli, lima beans, melons, cucumber, papayas, mangos, kiwi, and spinach. These same foods contain many other nutrients that our bodies need to stay healthy and biologically young.