Carrageenan

If your cat has gut inflammation or a sensitive stomach, ask your vet whether a carrageenan-free food makes sense.

Carrageenan is a thickener extracted from red seaweed that gives wet cat food a jelly texture. A 2021 review of carrageenan and inflammatory bowel disease said it can trigger inflammation in laboratory and animal models, that its safety is still debated and that no definitive data are available. The review focuses on people, and we found no studies in cats. If your cat has gut inflammation or a sensitive stomach, ask your veterinarian.

Source: pubmed.ncbi.nlm.nih.gov

Carrageenan thickens liquids and helps form gels. In cat food it holds gravy together and keeps loaf and pate textures firm, so the food looks the same from the first can to the last. It adds no meaningful nutrition and is used in small amounts. Dry kibble seldom needs it, which is why it shows up far more often in wet food.

It is mostly found in wet cat food, where it thickens gravy and sets jelly and pate textures. Dry kibble rarely needs a gelling agent, which is why carrageenan appears on only 1 of the 149 dry cat foods Pettings lists. If you are trying to avoid it, check the labels of canned and pouch foods first.

Food-grade carrageenan is a large molecule extracted from red seaweed. Degraded carrageenan, also called poligeenan, is broken down into much smaller pieces with acid and heat, and it is not permitted as a food ingredient. Part of the research linking carrageenan to gut inflammation in lab animals used the degraded form, which is one reason scientists still debate how those results apply to food-grade carrageenan.

Source: pubmed.ncbi.nlm.nih.gov

Pettings gives carrageenan 2 out of 5 and lists it as a thickener. It appears on 1 of the 149 dry cat foods we list. The middle score reflects an ingredient with a technical purpose and an unsettled research debate about gut effects. Each food's page shows how it scores overall.