Gluten is a family of proteins found in grains such as wheat, barley, rye, and their hybrids, as well as items (such as oats and even lentils) that have been contaminated with gluten by growing beside these grains on farms. If you have gluten intolerance or celiac disease, then understanding which foods are free of gluten and which contain gluten is important. (Celiac disease is an autoimmune condition in which people experience damage to their small intestine when they consume gluten. Non-celiac gluten sensitivity also causes gastrointestinal symptoms from gluten consumption.) When purchasing…