Gluten is referred to as the protein composite mainly present in those foods that are processed from wheat and other associated grain species that includes rye and barley. The elasticity of your dough is due to the presence of this compound that also helps in giving the specific shape and thus aiding in the rise finally give it a chewy texture. Gluten is composed of glutelin and gliadin seen in the endosperms of different grass-related grains along with starch. Gluten is considered as the richest protein source that is present in those foods having the sources and added as an additive in the others that has lower protein content. Certain pet foods also have gluten added to their protein content to enhance the richness and nutritional value.