Carrageenan Kappa is an excellent gelatin source for vegetarians. It's a fine white powder produced from a compound found in red seaweed that is used as a food additive. It forms the firmest gel of all carrageenan used to thicken and stabilize, and as a fat substitute in low fat foods. It is used primarily with dairy products to prevent separation and provide a consistent texture and is typically added to whipped cream to provide a consistent light and airy texture and to low-fat meats to provide tenderness.