Gluten is a protein composite found in foods derived from wheat and wheat-related grain species. It gives elasticity to dough and often gives the final product a chewy texture. For many people (with food allergies or Celiac Disease), gluten is not an option in their daily diet. For those people, we have a great list of grains that are not only gluten-free, but are good food you too. The following five gluten-free grains lack the blood sugar raising potential or intestinal disruptive lectin of wheat that can be harmful to your digestive system.