A new renal food may help with kidney disease in cats
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Cats and kidney diseasePart of a story we are following · 3 articles · See every update
If your cat has kidney disease, here is good news from the food bowl. A renal food with a special fat gave cats with kidney disease more of the fuel their kidneys like best. It also lowered several signs of inflammation in their blood.
The fat is called C8 medium-chain triglyceride, or C8 MCT. It is a type of fat the body absorbs quickly and turns into ketones. Kidneys can burn ketones for energy. That matters because kidneys work hard all day, and in kidney disease they struggle to make enough energy.
How the study worked
Researchers followed 16 cats with kidney disease that developed naturally. The cats lived at a pet food company’s research center. Each cat ate two foods in turn, 8 weeks each: a standard dry renal food, and the same kind of food with 8% C8 MCT added in place of some pork fat. Both periods were measured with blood and urine tests. The study was published in January 2026 in the Journal of Animal Science. It measured blood markers rather than how long the cats lived, so that part is still to be learned.
What they found
On the test food, the cats’ fasting blood showed more beta-hydroxybutyrate, or BHB. That is the ketone kidneys prefer as fuel. In plain words, the cats had more of the energy source their kidneys like to use.
Several fats linked to inflammation also went down. These included ceramides and phospholipids, which are the kinds of fat that rise when the body is irritated. Fewer of them suggests calmer inflammation signals.
Compounds that help the body burn fat, called carnitine compounds, moved in both directions. Some went up and some went down.
Why does the fat matter?
Renal diets are already a main tool for cats with kidney disease. They mostly work by limiting phosphorus. This study shows the fat in the food can be adjusted too. Swapping part of the pork fat for C8 MCT, along with fish oil, gave the kidneys an easier fuel and cut some inflammation signals.
What you can do today
If your cat has kidney disease, a veterinary renal diet is one of the best tools you have. At your next vet visit, ask which renal food suits your cat and how to switch slowly over a week or two. Skip adding coconut oil or other fats on your own, since the study used a food made with exact amounts.
Talk about it at home
Kidneys are like busy workers who need good fuel to keep going. The cats in this study ate a food with a fat that turns into easy fuel for the kidneys. Their blood showed more of that fuel and fewer signs of inflammation.
Try it at home
How could scientists find out whether the food helps cats live longer? Think about how long they would need to watch the cats, and what they would compare.
Keep exploring
Copies this article and its questions so you can paste them into ChatGPT, Claude, Gemini or the AI you use, and keep the conversation going.
Questions and answers
- What is C8 MCT?
- It is a type of fat the body absorbs quickly and turns into ketones, a fuel that kidneys can use.
- What changed in the cats?
- Their blood showed more ketones, the fuel kidneys like, and fewer fats linked to inflammation.
- How long did the cats eat the food?
- Each cat ate the test food for 8 weeks and the standard renal food for 8 weeks.
- Should I add oil to my cat's food?
- No. Ask your veterinarian about a renal diet that suits your cat.
