GluteGuard is formulated to reduce the unpleasant symptoms of accidental gluten ingestion, regardless of the source of the gluten. Gluten occurs naturally in wheat, barley, rye and other cereal grains. Gluten can also be found in products that contain ingredients based on these grains, and in products manufactured in an environment where gluten may be present. Hidden gluten may be found in many products including sauces, marinades, gravies, processed meats, vegetarian meat alternatives and spices.