Diet Guide
Low Potassium Diet
When kidneys cannot remove enough potassium, levels build up in the blood. High potassium (hyperkalemia) can cause dangerous heart rhythm problems. A low potassium diet helps keep levels safe.
Why potassium matters
Potassium is a mineral that helps your heart and muscles work properly. Healthy kidneys filter excess potassium out of the blood. When kidney function declines, potassium can accumulate to dangerous levels. Your nephrologist will tell you your target potassium range based on your labs.
A low potassium diet is typically recommended when blood potassium is above 5.0 mEq/L. Most patients are advised to limit potassium to 2,000–3,000 mg per day, though your individual target may differ.
Lower potassium — choose freely
• Apples, applesauce
• Berries (blueberries, strawberries)
• Grapes, cranberries
• Pineapple
• Peaches (fresh or canned, drained)
• Cabbage, green beans
• Cauliflower
• Cucumber, lettuce
• Onions, peppers
• White rice, white bread, pasta
• Egg whites
• Chicken, fish (small portions)
Higher potassium — limit or avoid
• Bananas, oranges, kiwi
• Avocado
• Dried fruits (raisins, prunes, dates)
• Potatoes, sweet potatoes
• Tomatoes, tomato sauce, tomato juice
• Winter squash, pumpkin
• Spinach, Swiss chard
• Beans and lentils
• Nuts and seeds
• Bran cereals, whole grains
• Milk, yogurt (limit to ½ cup/day)
• Salt substitutes (contain potassium chloride)
Practical tips
Leach vegetables
Peeling and soaking potatoes or root vegetables in water for 2+ hours, then boiling in fresh water, can reduce potassium content by up to 50%.
Read labels
Many processed foods, sports drinks, and "lite" salts contain potassium chloride. Check the ingredient list.
Watch portion sizes
Even lower-potassium foods can add up. Stick to recommended serving sizes.
Avoid salt substitutes
Products like Nu-Salt and Morton Salt Substitute are high in potassium and can be dangerous for kidney patients.
Disclaimer: This guide is for general educational purposes only. Dietary needs vary by individual. Always consult your nephrologist or a registered renal dietitian before making changes to your diet.
Download this guide as a PDF
Print-ready, branded handout — bring it to your next appointment.
Questions about your potassium levels?
Our team reviews your labs at every visit and can connect you with a renal dietitian for personalized guidance.