Agar and carrageenan are more expensive than agar. The cost of agar extraction is high and the side effects of the product are few. Carrageenan is used as a beverage and meat adhesive, which is cheap and has a certain smell. It is used to make grapefruit honey. Carrageenan, as a good coagulant, can replace agar, gelatin and pectin. Jelly made of agar is not elastic enough and expensive. The disadvantages of using gelatin as jelly are low coagulability and melting point.