10 Common Habits That Can Damage Your Kidneys

6. Whole-wheat bread

Whole wheat bread is healthy and nutritious but when eaten in large quantities, especially by individuals with renal problems, it might cause serious harm to the kidneys. This is due to the high amounts of phosphorus and potassium contained in this type of bread.

One slice of whole-grain bread contains 81 mg of potassium and 57 mg of phosphorus, compared to one slice of white bread, which has only 37 mg of potassium and 35 mg of phosphorus.