Vital Wheat Gluten
A powdered form of wheat gluten is produced and sold as an additive for baking or used to make seitan. Vital wheat gluten is nearly all gluten and almost no starch. When used as an additive in baking, its purpose is to add elasticity to flours that would otherwise be low in gluten, such as whole wheat flour or rye. It improves the rise of the raw dough and also improves the texture and chewiness of the final product.