Bob's Red Mill Vital Wheat gluten is made from the natural protein found in the endosperm of the wheat berry. When combined with water it becomes highly elastic and taffy-like. Added to bread dough, it helps retain the gas and steam from baking and gives more volume to the baked bread. It can be especially helpful for baking breads made with coarse, whole grain flours and cereals. Bob's Red Mill is the most unique flour mill in the northwest.