A gluten free diet is the only treatment for the condition. Gluten is found in the grains wheat, barley and rye. On the gluten free diet you can eat many foods including meat, fish, fruit, vegetables, rice and potatoes. You can also eat gluten free substitute foods and processed foods that don't contain gluten.Wheat, rye, and barley are the major foods that need to be avoided while following a gluten-free diet. Gluten is also commonly added to processed foods, such as canned and boxed items. Furthermore, some grains, such as oats, may be cross-contaminated with gluten, depending on where they were processed.Gluten is a mixture of hundreds of distinct proteins within the same family, although it is primarily made up of two different classes of proteins: gliadin, which gives bread the ability to rise during baking, and glutenin, which is responsible for dough's elasticity. Not all grains contain gluten.