The Kidney-Friendly Diet: Foods to Eat and Limit

If you have Chronic Kidney Disease (CKD), a kidney friendly diet is a way of eating that helps protect your kidneys from further damage. If you consume too much of certain nutrients, your kidneys have to work overtime, which can stress them out and make kidney disease worse. A renal diet keeps the amounts of specific minerals and fluids in check so your body stays balanced and your kidneys do not have to work quite so hard.

Every piece of food you eat gets broken down and sent into your bloodstream. Healthy kidneys easily filter out what you don't need. However, if your kidneys are damaged, wastes like urea, creatinine, and extra minerals start building up.

Following proper renal diet guidelines is critical because it helps control blood pressure, reduces the fluid buildup that causes swelling in your legs and lungs, and prevents dangerous levels of minerals from hurting your heart and bones. It is one of the most powerful tools you have to slow down kidney damage!

Depending on your stage of kidney disease, your doctor or dietitian will tell you exactly which nutrients you need to track. Generally, a kidney friendly diet focuses on managing four main things:

• Sodium: Too much salt makes your body hold onto water, which raises your blood pressure and puts stress on your heart and kidneys.
• Potassium: While potassium is great for normal muscles, high levels can build up in kidney patients and cause dangerous heart rhythms.
• Phosphorus: High levels of phosphorus pull calcium out of your bones, making them weak and brittle.
• Protein: Your body needs protein to build muscles, but digesting it creates waste that your kidneys must clear.
• People with chronic kidney disease not on dialysis may need to lower their protein intake. You may need to eat high-quality protein but in smaller, controlled portions.
• However, if you are on dialysis, there is no need to limit protein intake. In fact, people on dialysis often need more protein in their diet.

The good news is that a renal diet is full of colorful, delicious food choices! Here are some fantastic foods that are naturally lower in sodium, potassium, and phosphorus:

• Blueberries and Strawberries: Berries are packed with antioxidants and fiber but are very low in potassium, making them a perfect sweet treat.
• Red Grapes: These contain flavonoids that support heart health and are safe for a kidney-friendly lifestyle.
• Garlic and Onions: Since you need to cut back on salt, garlic and onions are perfect for adding bold, savory flavor to your meals without adding sodium.
• Skinless Chicken Breast: A great source of high-quality protein that has less phosphorus than processed meats or dark meat.
• Egg Whites: Egg whites provide pure, high-quality protein with a fraction of the phosphorus found in egg yolks.
• Macadamia Nuts and Pecans: Most nuts are very high in phosphorus, but macadamia nuts and pecans are a delicious, kidney-safe exception when eaten in moderation.
• Cauliflower: This versatile veggie is incredibly low in potassium and phosphorus. You can steam it, roast it, or even mash it up as a kidney-friendly alternative to mashed potatoes.

To protect your filtration system, it is best to limit or swap out foods that overload your body with waste. Here are the top items to watch out for:

• Dark Coloured Sodas: Many dark sodas contain artificial phosphorus additives that your body absorbs very easily. Opt for clear sodas or water infused with berries instead. Note: always follow your doctor’s recommended fluid intake for the day.
• Avocados and Bananas: While they are incredibly healthy for the average person, they are packed with potassium and should be limited on a restricted renal diet.
• Canned Foods and Processed Meats: Canned soups, hot dogs, and deli meats are loaded with sodium to keep them fresh. Look for "no salt added" canned options and always rinse canned veggies before cooking.
• Phosphorus additives or “phosphates”: Phosphorus is not just naturally found in foods, it can often be added as a preservative in many processed or prepackaged foods. Phosphorus additives are very easily absorbed into your bloodstream and are often a culprit in high blood phosphorus levels. When consuming packaged and processed foods, always check the ingredients list for these. Any ingredients that include “phos” are likely phosphorus additives. For example, sodium phosphate and phosphoric acid are two commonly used additives. If you notice a food that contains many ingredients with “phos,” look for an alternative.
• Oranges and Orange Juice: These are famous for their high potassium content. Apples, grapes, and cranberries are much safer choices.

Shifting your eating habits can feel overwhelming at first, but a few simple habits can make a world of difference:

1. Read Food Labels: Always check the nutrition facts for sodium levels. Aim for items with less than 5% of the Daily Value for sodium. Watch out for "phos" on the ingredient list, which means phosphorus additives are present. Always check the amount of potassium per serving if your doctor has recommended a lower potassium diet.
2. Cook More at Home: Most restaurant foods and packaged meals are heavy on the salt shaker. When you cook fresh foods at home, you have complete control over what goes into your dish.
3. Spice it Up: Use fresh herbs, lemon juice, black pepper, and apple cider vinegar to make your meals taste exciting without relying on salt.

It’s easier to keep your health goals on track when you have support in your corner. Our Health eCooks library of renal diet recipes and tips is there to help you when you need some inspiration to cook and eat right: best of all, it’s free and available 24-7! We update our recipes and informative articles regularly, so be sure to check back when you need some new cooking ideas.