Kosher All Natural High Protein 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 & taffy-like. Added to bread dough, it helps retain the gas & steam from baking & gives more volume to the baked bread. It can be especially helpful for baking breads made with coarse, whole grain flours & cereals.