What is the ruling on sweets that contain carrageenan?

The basic principle concerning foodstuffs is permissibility, and one does not resort to prohibition except with specific evidence. Carrageenan is extracted from pure marine algae, and the basic principle concerning seafood is permissibility, based on the Almighty's saying: "Lawful to you is hunting game from the sea and its food as provision for you and for those who travel." Therefore, the basic principle concerning this substance is that it is permissible, unless its harm is proven.