What is Gelatin? Gelatin is extracted from collagen and is a high molecular weight protein composed of 18 amino acids. Bovine hide , bones , pig skin and fish scales are normally used for the production of the gelatin. Gelatine amino-acid composition Gelatin can absorb 5-10 times of water and if heated, it enters a sol state. Upon cooling, it enters a gel state. Because of its special properties, ...