Gelatin, also known as gelatin or fish glue, is an important auxiliary material for making delicious food, mostly used for making desserts and jellies, and its main ingredient is protein.

Pigskin jelly is a traditional delicacy made from pigskin. Protein in pigskin can't be completely removed during boiling, so there will be a certain amount of protein in pigskin jelly. Adding gelatin can increase the curability of pigskin jelly and make it softer and more waxy.