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
Pasta pasta. The dried pasta is then packaged: Fresh pasta is sealed in a clear, airtight plastic container with a mixture of carbon dioxide and nitrogen that inhibits microbial growth and prolongs the product's shelf life; dried pastas are sealed in clear plastic or cardboard packages. Gluten, the protein found in grains such as wheat, rye, spelt, and barley, contributes to protein aggregation and firm texture of a normally cooked pasta. Gluten-free pasta is produced with wheat flour substitutes, such as vegetable powders, rice, corn, quinoa, amaranth, oats and buckwheat flours. Other possible gluten-free pasta ingredients may include hydrocolloids to improve