Xanthan Gum is used by people who are allergic to gluten to add volume and viscosity to bread and other gluten-free baked goods. It is made from a tiny microorganism called Xanthomonas campestris and is a natural carbohydrate. Xanthan Gum helps replace the gluten in a recipe and aid in binding and thickening recipes. It is an essential ingredient in gluten free baking.