Gluten-free beer example: Sheehan, Evans & Skerritt, 2001). Brewers who produce low gluten beers are required to test every batch for gluten, and record gluten levels in "parts per million" ('ppm'). Although the barley hordein in such tests may not be detected, smaller pieces of these proteins, known as peptides, may remain and be toxic for celiacs. Those involved in gluten-free brewing, and others representing celiacs or those with other conditions that require a gluten-free diet, tend to be concerned that beer brewed using wheat or barley are not appropriate for those with celiacs or dermatitis herpetiformis, although the carefully controlled gluten
Wheat allergy comes from the progenitor species "Aegilops speltoides". This indicates that nascent mutations on the B genome of wheat are from a small number of cultivated Triticeae species. Recent study of WDEIA shows that both aspirin and exercise increase the presence of gliadin in the blood stream and the chronic induced response may extend to NSAIDs, MSG, Benzoate and other synthetic chemical food additives. Baker's allergy has a ω-gliadin component and thioredoxin hB component. In addition, a gluten-extrinsic allergen has been identified as aspergillus amylase, added to flour to increase its baking properties. Contact sensitivity, atopic dermatitis, eczema, and urticaria appear