The 9 Best Foods to Eat for Kidney Health, According to Doctors

As a dietitian, I spend a lot of time talking about how food impacts our bodies. But as far as key organs go, the kidneys often get overlooked—yet keeping them healthy by eating the best foods for kidney health can help them effectively filter waste from the blood, regulate blood pressure, balance fluids, and carry out more essential tasks in the body.

Meet the experts: Lauren Manaker, R.D., author; Melanie Betz, M.S., R.D., C.S.R., the founder of The Kidney Dietitian; Stefanie Diaz, M.D., a nephrologist at The Centers for Kidney Care in Tyler, TX; Blake Shusterman, M.D., a nephrologist and owner of The Cooking Doc.

“One of the main functions of the kidney is to get rid of waste that is created during metabolism. The waste of some foods is easier on the kidneys than others,” explained Melanie Betz, M.S., R.D., C.S.R., the founder of The Kidney Dietitian. While all foods leave behind some metabolic waste, certain choices are much gentler on the kidneys and may help them do their job more efficiently.

Read on to discover the best foods to eat for kidney health, according to dietitians and kidney experts.

When it comes to protecting your kidneys’ health, your plate is your first line of defense. If you have kidney disease or are at an increased risk for developing it, such as if you have diabetes, high blood pressure, or heart disease, the goal is to choose foods that are naturally low in sodium, phosphorus, and potassium, while being rich in antioxidants and anti-inflammatory compounds. Here are some food choices that stand out when it comes to their ability to support kidney health.

Blueberries

Blueberries are a delicious and nutrient-packed addition to a kidney-friendly diet. These vibrant berries are rich in antioxidants called anthocyanins, which not only give them their deep blue color but also help protect the body’s cells, including those in the kidneys, from oxidative stress and inflammation. “Blueberries are high in antioxidants, which can be beneficial for people who are looking to protect their kidneys, and they are also high in fiber, which many people don’t get enough of. Additionally, they are low in potassium, phosphorus, and sodium, making them a safe fruit for people with every stage of kidney disease,” shared Blake Shusterman, M.D., a nephrologist and owner of The Cooking Doc.

Beyond their kidney-protective properties, blueberries may also support gut health, which plays a key role in managing chronic kidney disease (CKD). Specifically, an imbalance in gut bacteria (gut dysbiosis) may lead to harmful effects like inflammation for those with CKD. While studies in CKD patients are limited, early evidence shows that even small amounts of berries could have positive effects on gut health among the population by supporting the growth of beneficial bacteria.

Cauliflower

Cauliflower has become a culinary chameleon, and for good reason. Its mild flavor and adaptable texture make it a fantastic addition to any meal, but it’s especially valuable for those focused on kidney health. It’s a cruciferous vegetable that packs a nutritional punch without overloading your system with minerals that can be hard on compromised kidneys.

“Cauliflower is packed with vitamin C, fiber, and anti-inflammatory compounds. Because it’s lower in potassium, it makes a wonderful alternative to potatoes for patients who have difficulty clearing potassium, while still providing key nutrients,” added Stefanie Diaz, M.D., a nephrologist at The Centers for Kidney Care in Tyler, TX. For people with kidney disease, limiting potassium is important because high levels can build up in the blood when the kidneys aren’t functioning properly, potentially leading to heart health concerns.

Another reason why cauliflower is fantastic for those focused on kidney health is that it contains a compound called sulforaphane. This compound works by activating a key protein that helps protect cells from damage caused by oxidative stress. While research on sulforaphane’s benefits for kidney health is still limited, its potential as a nutritional therapy to support healthy aging and reduce inflammation makes it an ideal addition.

Garlic and herbs

Reducing sodium is an important part of a kidney-friendly diet, as excess salt can raise blood pressure, a leading cause of kidney damage. Instead, turn to your spice rack for flavor. “Sneak in the secret flavor enhancer for kidney health: garlic and herbs. [They contain] antioxidants that reduce inflammation and help control blood pressure while adding flavor without salt,” suggested Dr. Diaz. Garlic, with its anti-inflammatory compound allicin, and herbs like rosemary, thyme, oregano, parsley, and cilantro, can transform simple dishes into flavorful, kidney health-supporting meals.

Red bell peppers

Red bell peppers are a food low in potassium, which is a key consideration for many people with kidney disease, while being incredibly high in other essential nutrients. These peppers are an excellent source of vitamins A and C, as well as B6, folic acid, and fiber.

The vibrant red color comes from lycopene, a powerful antioxidant that helps fend off certain types of cellular damage. Research shows that lycopene’s antioxidant and anti-inflammatory properties may protect the kidneys, reduce the risk of chronic kidney disease, and even lower mortality in some chronic kidney disease patients. It has also been linked to a lower risk of kidney cancer and may help reduce kidney damage caused by certain medications like cisplatin (a widely used cancer medication).

Olive oil

Choosing the right fats is crucial for overall health, and heart health is closely linked to kidney health. This is one reason why olive oil is a fantastic choice for those who are focused on kidney health. It is a monounsaturated fat that is a source of antioxidants and has powerful anti-inflammatory properties. Using olive oil in place of butter, margarine, or other saturated fats may help reduce inflammation and lower your risk of cardiovascular disease, potentially reducing your risk of developing kidney disease as well.

What’s more, because it’s phosphorus-free, olive oil is an ideal fat source for a kidney-friendly diet, as excess phosphorus can build up in the blood when kidneys aren’t functioning properly, potentially leading to bone and heart-health concerns.

Apples

Apples are both practical and nourishing, making them a perfect snack for kidney health. They are relatively low in potassium and deliver a healthy dose of fiber, especially when you eat the skin. The fiber helps support healthy digestion and blood sugar regulation, which are important factors for keeping kidneys in top shape. Plus, apples contain anti-inflammatory polyphenols and vitamin C.

Oxidative stress is a serious concern for people on hemodialysis (HD), particularly, and is linked to higher risks of illness and death. Because apples are a source of antioxidants, eating them may help reduce this stress. An older study showed that people on hemodialysis who ate apples daily showed improvements in key antioxidant markers, while separate research in The American Journal of Medicine found that simply increasing your intake of fruits and vegetables may reduce kidney disease risk.

Grapes

Grapes, especially the red and purple varieties, offer a sweet way to add antioxidants like flavonoids and resveratrol to your diet. Research has linked resveratrol intake to improved endothelial function in patients with chronic kidney disease and diabetes.

Additionally, grapes are low in potassium and make a hydrating, naturally sweet snack that’s easy to pack for work, school, or when you are generally on the go.

Salmon

Protein is essential for building and repairing tissues, but for those with kidney issues, managing intake is crucial to avoid excess waste buildup that can strain the kidneys, making it important to find the right balance. Salmon is an excellent choice for a kidney-friendly protein source because it is rich in high-quality protein. Unlike many ultra-processed protein options, which are often high in sodium and additives that may be harmful to kidney health, salmon provides a natural, leaner option that supports muscle maintenance without overloading the kidneys with waste products. For many with compromised kidney function, limiting protein intake is key, and a portion size about the size of a deck of cards is often recommended, or 3 to 4 ounces. For some, an even smaller serving is suggested.

In addition to its protein benefits, salmon is packed with omega-3 fatty acids, which have powerful anti-inflammatory properties. Chronic inflammation is a common issue in kidney disease, and omega-3s can help reduce this, potentially slowing the progression of kidney damage.

White rice

For those who need to limit phosphorus and potassium, white rice can be a helpful and versatile grain to pair with meals. It is naturally low in both, making it a great option for individuals with kidney issues who need to carefully manage their intake of these minerals. White rice is also easy to digest, gentle on the stomach, and provides a reliable source of energy through its carbohydrate content, which is especially important for maintaining energy levels if protein intake is restricted.

Unlike brown rice, which contains higher levels of phosphorus and potassium due to its bran layer, white rice is milled to remove these components, making it a more kidney-friendly choice. Additionally, white rice is a blank canvas for flavor, allowing you to enhance it with herbs, spices, or low-sodium seasonings to create delicious and satisfying meals.

Caring for your kidneys is one of the best long-term investments you can make for your health. By filling your plate with some of the top foods for kidney health, like antioxidant-packed blueberries, versatile cauliflower, and bold-tasting garlic, you’re giving these vital organs the natural support they need. Just remember, it’s not about chasing a single “superfood” but embracing the power of your overall choices.

Think of it as crafting meals that are as delicious as they are nourishing: Fresh produce, lean proteins, healthy fats, and smart, low-sodium seasonings all come together to reduce strain on your kidneys while fueling your whole body. Every mindful, kidney-friendly choice you make is a step toward building a strong foundation for lifelong wellness, and it tastes pretty amazing, too!