The mineral potassium helps balance fluids in your body, and ensure that your nerves and muscles function properly. If your kidneys aren’t functioning as they should, then potassium can build up in your blood, which upsets the delicate balance of fluids and minerals. If this is the case, then you may need to limit the amount of potassium you consume. Your doctor can determine how much potassium is safe for you to eat, and your renal dietitian can help adjust your diet accordingly. Here are some general guidelines regarding foods that are higher and lower in potassium.*

Foods high in potassium

Many fruits, vegetables, and dairy products contain high amounts of potassium, including: 

• Avocado, bananas, cantaloupe, dates, guava, kiwi, oranges 
• Tomatoes, and tomato products
• Broccoli, spinach, and other leafy greens
• Potatoes, both white and sweet
• Milk, cheese, and yogurt and milk products like yogurt and cheese.
• Legumes, such as beans and lentils
• Nuts and seeds
• Whole grains 

Within these categories, certain foods have more potassium than others, so work closely with your dietitian to determine which ones you can keep on your food list, and in what quantities.

Foods low in potassium

Some foods are naturally lower in potassium, so are generally safe to eat when you have chronic kidney disease (CKD). Some low-potassium foods to incorporate into your diet are:

• Apples, apricots, berries, cherries, grapefruit, grapes, honeydew melon, peaches, pears, watermelon 
• Asparagus, cabbage, carrots, cauliflower, celery, cucumbers, eggplant, green beans, peas, peppers, squash, zucchini 
• Pasta, rice, and tortillas

Ask your dietitian about appropriate amounts for you. Approximately ½ cup of fruits and vegetables is the standard. Most herbs and spices are fine to use, but avoid “lite” salts and salt substitutes, as they are often high in both potassium and sodium. 

Some foods, however healthy, can interact with certain medications. Let your doctor and dietitian know what medications and supplements you are taking.

*Alberta Health Services. (n.d.) Potassium-Restricted Diet: Care Instructions. https://myhealth.alberta.ca/Health/aftercareinformation/pages/conditions.aspx?hwid=uh3997#:~:text=Eat. 

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