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Senior cat eating from bowl in sunny kitchen
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The 9 Best Cat Foods Low in Phosphorus to Slow Kidney Disease in Your Cat

Updated January 30, 2025 | Miscellaneous
By Karen Anderson
Updated by Carolyn Wynnack

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  • This review contains affiliate links. Read more here.
  • Not a substitute for professional veterinary help.

Coming to grips with a kidney disease diagnosis for your cat can be tough. But there are lots of reasons to be hopeful, especially since when chronic kidney disease is spotted early, your cat can have many more years to enjoy. One way to help extend their life is to start them on a diet of cat food low in phosphorus.

Three out of 10 geriatric cats (age 15 or older) will receive a diagnosis of chronic kidney disease. My deaf white cat, Sheba, was diagnosed at age 14. She went on to spend more than four more happy years chasing the other cats in our household and swatting vases off the mantelpiece.

In this article, we take a look at chronic kidney disease in cats (also called chronic renal failure) and the low-phosphorus diet for cats recommended by many veterinarians to slow the progression of the disease.

Royal Canin cat food low in phosphorus

Royal Canin Veterinary Diet Renal Support E

This highly appealing pâté in gel can be combined with any of Royal Canin’s non-prescription food or offered on its own.

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Table of Contents

  1. Understanding Kidney Disease in Cats
  2. Why Get a Cat Food Low in Phosphorus?
  3. The Best Cat Food Low in Phosphorus
  4. Royal Canin Veterinary Diet Renal Support E
  5. Hill’s Prescription Diet K/D Kidney Care
  6. Blue Buffalo Natural Veterinary Diet Kidney and Mobility Support for Cats
  7. Purina Pro Plan Veterinary Diets NF Kidney Function Early Care
  8. Forza10 Nutraceutic Actiwet Renal Support Low-Phosphorus Cat Food
  9. Weruva Truluxe Steak Frites Low Phosphorus Cat Food
  10. Fussie Cat Super Premium Chicken in Gravy
  11. Wellness Healthy Indulgence Morsels with Chicken and Chicken Liver
  12. Hill's Science Diet Tender Tuna Dinner
  13. Tips for Homemade Low-Phosphorus Cat Food
  14. Further Reading

Understanding Kidney Disease in Cats

Kidney disease in cats can be caused by a bacterial infection, but often the exact cause remains unknown. For whatever reason, your cat’s kidneys stop doing their job of removing waste products, such as proteins and phosphorus, and excreting them in urine. As a result, the cat’s systems are thrown out of balance. All sorts of problems can occur, from high blood pressure to anemia.

What are the first signs of kidney disease? Your cat may show increased thirst or begin urinating more frequently. Though they eat normally, you may see subtle weight loss. As the disease progresses, some cats may experience a decreased appetite, more severe weight loss, lack of energy, and poor grooming habits.

Kidney disease is not curable, but if the condition is caught early on, a healthy diet can enable cats to live a long life. As the condition progresses, cats may be given phosphorus-binding drugs before meals, subcutaneous fluids, and other medications. But let’s start with the food.

Why Get a Cat Food Low in Phosphorus?

A low-phosphorus diet is designed to reduce kidney workload and improve health. Research shows that cats with chronic kidney disease fed a low-phosphorus diet can live up to twice as long as cats with no dietary changes.

The best cat food for cats with chronic kidney disease will reduce kidney workload by moderating protein, carbohydrate, and phosphorus intake. Because poor kidney function allows acids to build up, kidney diets are alkaline, helping to neutralize harmful acids.

“Kidney diets are actually very different from regular cat food,” explained Dr. Joe Wakshlag, veterinarian and professor at Cornell University College of Veterinary Medicine in a video previously shared on the school’s YouTube channel. “They have reduced levels of phosphorus and protein, and they have increased levels of potassium, B vitamins, and fatty acids.”

It’s always a good idea to introduce any new cat food, including low-phosphorous food, gradually by mixing it in with your cat’s regular food. Over time, your cat can be switched fully to the low-phosphorus diet. If they get tired of one brand of low-phosphorus food (as cats do), you can introduce another or cycle through several different kinds.

As you’re trying out new foods, avoid foods labeled “urinary diets” unless they’re recommended by your veterinarian. Those are designed to prevent the formation of kidney stones—a very different condition—and can actually aggravate kidney disease in cats.

The Best Cat Food Low in Phosphorus

You’ll find two types of low-phosphorus foods on our list of favorites:

  • Prescription veterinary diets with carefully calibrated amounts of phosphorus, sodium, protein, minerals, vitamins, and fatty acids. These are usually alkaline, rather than acidic, foods.
  • Low phosphorus foods that include premium, natural ingredients but do not claim to address the range of kidney issues that prescription foods are designed to treat.

You’ll want to check with your vet to see what they recommend for your cat. For prescription foods, you’ll have to provide a prescription or your veterinarian’s contact information to purchase. Your vet often can offer their advice on non-prescription foods as well, ensuring that the food you choose meets your cat’s individual needs. Depending on your cat’s prognosis and any other health concerns that may be present, some non-prescription foods may not be recommended.

Royal Canin Veterinary Diet Renal Support E

Because cats with kidney disease tend to lose weight, Royal Canin has formulated this low-phosphorus pâté in gel to be as tasty and enticing as possible. In addition to the pâté, Royal Canin makes other renal support formulas including D (morsels) and T (slices), and it’s worth experimenting to see if your cat prefers one over the others. Prescription required.

Royal Canin cat food low in phosphorus

Royal Canin Veterinary Diet Renal Support E

This highly appealing pâté in gel can be combined with any of Royal Canin’s non-prescription food or offered on its own.

Shop on ChewyShop on AmazonShop on Petco

Hill’s Prescription Diet K/D Kidney Care

This prescription diet is designed to protect kidney and heart function while boosting your cat’s energy and vitality with targeted levels of high-quality protein and controlled phosphorus. Prescription required.

Hill's Kidney Care cat food low in phosphorus

Hill’s Prescription Diet K/D Kidney Care

This chicken and vegetable stew is a tasty low-phosphorus meal with plenty of texture and appeal.

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Blue Buffalo Natural Veterinary Diet Kidney and Mobility Support for Cats

Available in both dry and wet forms, this veterinary diet is a nutritious low-phosphorus and low-sodium food for cats. The Blue Buffalo brand focuses on preservative-free natural ingredients. Prescription required.

Blue Buffalo cat food low in phosphorus

Blue Buffalo Natural Veterinary Diet Kidney and Mobility Support for Cats

This preservative-free formula is available in both dry and wet forms.

Shop on ChewyShop on AmazonShop on Petco

Purina Pro Plan Veterinary Diets NF Kidney Function Early Care

This specially formulated wet food contains a moderate amount of high-quality protein and restricted phosphorus. It can be combined with the kibble version of this diet if your cat enjoys dry food. Purina also makes an Advanced Care formula. Prescription required.

Purina Pro Plan Veterinary Diets NF Kidney Function formula

Purina Pro Plan Veterinary Diets NF Kidney Function Early Care Formula

Designed for cats in early stages of renal disease, it provides moderate protein with reduced phosphorus.

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Forza10 Nutraceutic Actiwet Renal Support Low-Phosphorus Cat Food

If you are trying to find a low-phosphorus cat food your cat will like, it may be worth giving Forza10 a try; it aims to put great taste into a food that’s healthy for cats with renal disease. The appealing recipe was developed by veterinarians and nutritionists in Iceland, but you can get it without a prescription. Plus, Forza10 has a dry food for cats with kidney disease available as well. No prescription needed.

Forza10 cat food low in phosphorus

Forza10 Nutraceutic Actiwet Renal Support Wet Cat Food

Salmon, chicken liver, and lamb are the main ingredients for this renal formula made in Iceland.

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Weruva Truluxe Steak Frites Low Phosphorus Cat Food

Weruva Truluxe Steak Frites is not a veterinary kidney disease formula, but it is low in phosphorus and sodium. If your cat is turning up their nose at some of the other low-phosphorus foods, this could be a good choice to keep them interested in eating. Check with your vet to make sure they’re OK with feeding it to a cat with early-stage renal disease. No prescription needed.

Weruva Truluxe low-phosphorus cat food

Weruva Truluxe Steak Frites Low Phosphorus Cat Food

This non-prescription beef and pumpkin recipe is low in phosphorus and sodium.

Shop on ChewyShop on Amazon

Fussie Cat Super Premium Chicken in Gravy

Produced in a human-grade food manufacturing facility, this canned food recipe is low in fat and phosphorus but includes high-quality animal protein from chicken. It’s not a prescription food, so check with your vet to see if the phosphorus level will work for your kitty. No prescription needed.

Fussie Cat food low in phosphorus

Fussie Cat Super Premium Chicken in Gravy

Is your kitty a fan of shredded chicken in gravy? This low-phosphorus food may appeal.

Shop on ChewyShop on Amazon

Wellness Healthy Indulgence Morsels with Chicken and Chicken Liver

This food from Wellness isn’t specifically designed for cats with renal disease, its grain-free, high protein, and relatively low-phosphorous recipe makes it an option for some. It’s especially appealing to cats who like chunky foods. Your vet can help you decide if it’s right for your cat. No prescription needed.

Wellness wet cat food low in phosphorus

Wellness Healthy Indulgence Morsels

This non-prescription food featuring chicken in a savory sauce is low in phosphorus.

Shop on ChewyShop on AmazonShop on Petco

Hill’s Science Diet Tender Tuna Dinner

While not marketed as therapeutic food for cats with renal issues, this food from Hill’s Science Diet does have relatively low phosphorus (0.52 percent). Consult with your veterinarian to see if they think this is appropriate for your cat. No prescription needed.

Hill's tuna cat food low in phosphorus

Hill's Science Diet Tender Tuna Dinner

You can limit phosphorus while still giving your kitty a delicious tuna dinner.

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Tips for Homemade Low-Phosphorus Cat Food

Cats with moderate to severe kidney disease sometimes become picky eaters. If packaged foods don’t work for your kitty, a homemade diet may be the best option.

It’s not always a good idea to grab a recipe off the internet, even if it’s touted as being great for a cat with kidney failure. Instead, consult with a veterinarian or a credentialed veterinary nutritionist—they’ll have a recipe or two that will be safe and effective for your cat.

Further Reading

  • What To Do If Your Cat Is Not Drinking Water
  • The Best Food for Senior Cats
  • Meals that Heal—The Best Food for Cats with Allergies

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Karen Anderson

Karen Anderson

Karen Anderson is a Seattle-based freelance writer specializing in technology and lifestyle topics. Her hobbies include dancing, gardening, science fiction, and pet-sitting for friends and neighbors. She's a member of the Cat Writers' Association and shares her house with a delightful clowder of quirky rescue cats.


Updated by Carolyn Wynnack

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By Karen Anderson

Updated by Carolyn Wynnack

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