Kidney-friendly foods to add to the diet include lower protein foods such as breads, fruits, vegetables, pasta and rice. Doctors recommend lower protein foods for patients with kidney problems because too much protein in the diet may cause damage to the kidneys, according to the American Kidney Fund.
Many patients with kidney disease also need to limit potassium and phosphorus intake. Examples of fruits that are lower in protein and potassium include apples, cranberries, grapes, pineapples and strawberries. Vegetables that fall into this category are cauliflower, peppers, squash, radishes and lettuce, states the AKF. Other foods that are acceptable include pita bread, tortillas and white rice.
Foods that are low in phosphorus include Italian and French bread, corn or rice cereals, unsalted popcorn and lemonade. Healthy fat intake is also suggested for kidney disease patients. Sources of healthy fat are olive oil and other vegetable oils, according to the AKF.
Some fruits and vegetables to avoid due to high levels of protein or potassium include bananas, melons, kale, spinach and eggs. Whole grain breads, oatmeal, bran cereals and dark sodas contain higher levels of phosphorus and should be limited or avoided, suggests the AKF. Doctors may also limit fluid intake depending on the state of the kidneys.