A gluten-free diet is most commonly used as a treatment for celiac disease, also known as celiac sprue or gluten-sensitive enteropathy. Gluten is a protein found in wheat, barley, rye and certain oats (WBRO).
Grains are used in the processing of many ingredients, so it will be necessary to seek out hidden gluten. In addition, although some grains are able to be eaten by patients with celiac disease, it is important to realize that some foods may be processed in factories that may also process gluten and therefore cross-contamination may occur.