Worth knowing · Thickener

Carrageenan

Also appears on labels as: Irish moss extract

A seaweed-derived polysaccharide that gels wet food into a pate or gravy.

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Where it comes from: Extracted from red seaweed.
Why it's in the product: Texture in canned and pouched food.
Safety and toxicity: Food-grade carrageenan is different from poligeenan, the degraded form used to induce inflammation in lab research, and regulators consider it safe. Some studies suggest food-grade carrageenan can partially degrade during digestion.
Interactions and who should be careful: A mild caution: fine for most pets, worth avoiding if yours has chronic GI issues. Agar-agar and guar gum thicken without the debate.

What the research says

Food-grade carrageenan is different from the degraded form (poligeenan) used to induce inflammation in lab research, and regulators consider it safe. Still, some studies suggest food-grade carrageenan can degrade during digestion, and some cats with sensitive stomachs do better without it.

We treat it as a mild caution: fine for most pets, worth avoiding if yours has chronic GI issues, and easy to find pâtés that thicken with agar-agar instead.

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General reference, not veterinary advice. Dose, breed, and existing conditions change the answer, so talk to your vet before changing what your pet eats. Think we got this wrong? Tell us and we log it publicly.