Foods To Avoid For Optimal Kidney Health

57. Bran Cereals – The Fiber Trap

Fiber is essential—but not all sources are kidney-friendly. Bran cereals, while marketed for gut health, are packed with phosphorus and potassium, often exceeding safe limits for people with kidney disease. A single cup can deliver more than 200 mg of phosphorus and 300 mg of potassium—well before milk is even added. Many also include phosphate additives for shelf stability.

58. Restaurant Soups – Comfort with a Cost

That cozy bowl of restaurant soup might seem harmless—but it’s often a silent sodium and potassium overload. Broths are typically made with salty stocks, cured meats, or bouillon cubes, and potassium-rich ingredients like tomatoes, potatoes, and beans. One serving can easily exceed 1,500 mg of sodium—and restaurants rarely list exact content. For those with kidney concerns, this can spike blood pressure and lead to fluid retention.