Gelatin, also known as meat feet or gelatin, is generally used to make jelly or other desserts. It is made from boiled animal bones, skin and tendons. Its main ingredient is protein, and the other substitute is generally made from the roots of kudzu.

Generally speaking, gelatin is divided into two types: one is medical gelatin and the other is edible gelatin. The gelatin is purchased according to the corresponding situation. The medical gelatin is made from animal skin, bone and tendon, and is fat-free and high-protein after extremely complex physical and chemical treatment, which is easily a kind of high-grade glue that can be absorbed by the human body. It has the characteristics of high viscosity, high freezing force and easy freezing. The appearance is light yellow or yellow particles. The color and shape of edible gelatin are similar to that of medicinal gelatin, but its function is very different. Edible gelatin is light yellow to yellow fine particles, which should be kept dry, clean, uniform and free of inclusions. This product is made from pigskin, cow skin, mule skin and horse skin. It has health care and beauty effects. The excellent colloid has protective properties, surface activity, viscosity, film forming property and water solubility.