Diet is an important consideration for those with impaired kidney function. Consultation with a dietician may be helpful to understand what foods may or may not be appropriate.
Since the kidneys cannot easily remove excess water, salt, or potassium, these may need to be consumed in limited quantities. Foods high in potassium include bananas, apricots, and salt substitutes.

Phosphorus is a forgotten chemical that is associated with calcium metabolism and may be elevated in the body in kidney failure. Too much phosphorus can leech calcium from the bones and cause osteoporosis and fractures. Foods with high phosphorus content include milk, cheese, nuts, and cola drinks.

Choose lower potassium foods. Your dietitian may recommend that you choose lower potassium foods. High-potassium foods include bananas, oranges, potatoes, spinach and tomatoes. Examples of low-potassium foods include apples, cabbage, green beans, grapes and strawberries.

Avoid products with added salt. Lower the amount of sodium you eat each day by avoiding products with added salt, including many convenience foods, such as frozen dinners, canned soups and fast foods. Other foods with added salt include salty snack foods, canned vegetables, and processed meats and cheeses. Limit phosphorus. Phosphorus is a mineral found in foods such as milk, cheese, dried beans, nuts and peanut butter. Too much phosphorus in your blood can weaken your bones and cause skin itchiness. Your dietitian can give you specific recommendations on phosphorus intake in your situation.

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