Non-celiac gluten sensitivity not yet universally adopted. For people on a gluten-free diet who are unable to perform an oral gluten challenge, an alternative to identify possible celiac disease is an in vitro gliadin challenge of small bowel biopsies; this test is only available at selected specialized tertiary-care centers. After exclusion of celiac disease and wheat allergy, the subsequent step for diagnosis and treatment of NCGS is to start a strict gluten-free diet (GFD) to assess if symptoms improve or resolve completely. This may occur within days to weeks of starting a GFD, but improvement may also be due to a non-specific, placebo
Wheat gluten (food) markets, health food stores and cooperatives. The block form of seitan is often flavored with shiitake or portobello mushrooms, fresh coriander or onion, or barbecue sauce, or packed in a vegetable-based broth. In strip form, it can be packed to be eaten right out of the package as a high-protein snack. Shaped seitan products, in the form of "ribs" and patties, are frequently flavored with barbecue, teriyaki, or other savory sauces. Wheat gluten is also used in many vegetarian products in various countries, for example by The African Hebrew Israelites of Jerusalem, a vegan African American religious sect that operates