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The role of Phosphorus, Potassium and Sodium

Key function of the kidneys is to remove or regulate the amount of phosphorus, potassium and sodium in the human body. Therefore, it is important to control their intake with Chronic Kidney Disease.

A key function of the kidneys is to remove excess phosphorus in the blood. As kidney function declines, phosphorus may accumulate in the blood. A tight balance of phosphorus, calcium, and vitamin D, is responsible for maintaining bone health. For individuals with CKD, reduced phosphorus intake is necessary to control this balance.

In addition, the kidneys play an essential role in regulating blood potassium levels. As kidney function declines, the body may not be able to regulate potassium as well. Elevated serum potassium levels can lead to heart problems. For patients with CKD, it is important to monitor blood potassium levels and implement a low-potassium diet only if Serum potassium levels are elevated.

Sodium intake must also be adjusted to maintain control of the patient’s blood pressure. Intake must be regulated in relation to the stage of the disease and the patient’s clinical profile.

Foods rich in phosphorus

  • Meat and charcuterie products
  • Fish and seafood
  • Eggs, yolk
  • Milk and dairy products
  • Legumes and soy
  • Whole wheat products (e.g. pasta, bread)
  • Breakfast cereals, muesli
  • Dried mushrooms
  • Nuts, seeds
  • Chocolate, bitter cocoa
  • Beverages (e.g. Coca Cola)
  • Industrial foods with additives which contain phosphorus (e.g. cheese, baking powder, instant pudding, cream, sauce, mayonnaise, ready meals)

Foods rich in potassium

  • Certain fruits, vegetables and juices, such as the ones listed on earlier pages
  • Whole wheat products
  • Legumes and soy
  • Nuts, seeds, chocolate, cocoa
  • Potatoes and potato products
  • Mushrooms

Foods rich in sodium

  • All kinds of salt
  • Ketchup, tomato products, soy sauce
  • Salted nuts, peanuts, and seeds
  • Fish and smoked charcuterie products
  • Ready meals
  • Certain types of mineral water
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