Low-calorie foods that are high in potassium include bananas, mushrooms, beet greens, papaya and plain low-fat yogurt. Some lean protein sources such as salmon, turkey and lentils are also rich in potassium.
Potassium is a mineral that helps the body in balancing fluids and maintaining normal blood pressure. Potassium is present in varying amounts in most foods. High-potassium foods are generally defined as foods that contain more than 200 milligrams of potassium in a serving.
Fruits are frequently considered a low-calorie food, and many types of fruit are high in potassium. Fruits high in potassium include mangoes, kiwis, oranges, pears and dried apricots. For example, one medium-sized mango contains roughly 325 milligrams of potassium and roughly 100 calories. Fruits that contain medium levels of potassium include peaches, apples and pineapples.
Vegetables are another food group that is generally low in calories. Vegetables containing high levels of potassium include Brussels sprouts, zucchini, broccoli and tomato.
In general, protein-based foods are higher in calories than vegetables and fruit. However, a number of low-fat protein sources are also high in potassium. These foods include salmon, lentils, turkey breast and lean beef. Three ounces of cooked salmon contains roughly 118 calories and 319 milligrams of potassium.