Potassium is a mineral found in many foods. Healthy kidneys remove excess potassium through urine, but reduced kidney function lets potassium accumulate — a condition called hyperkalemia that can cause dangerous heart rhythm problems.
High-potassium foods to limit:
- Bananas, oranges, cantaloupe, avocado, dried fruits
- Potatoes, tomatoes, winter squash, pumpkin
- Beans, lentils, nuts, and seeds
- Salt substitutes (these often contain potassium chloride — avoid them)
Lower-potassium alternatives:
- Apples, berries, grapes, pineapple, pears
- Green beans, cabbage, cauliflower, onions, cucumbers
- White rice, pasta, white bread
Leaching tip: Peel and dice vegetables, soak in water for 2+ hours, then boil in fresh water. This can reduce potassium content by up to 50%.
Always work with your nephrologist and a renal dietitian before making major changes — your safe potassium range depends on your CKD stage, lab values, and current medications.