Barley and their hybrids and derivatives, barley contains gluten, which makes it an unsuitable grain for consumption by people with gluten-related disorders, such as celiac disease, non-celiac gluten sensitivity and wheat allergy sufferers, among others. Nevertheless, some wheat allergy patients can tolerate barley or rye. Barley is a key ingredient in beer and whisky production. Two-row barley is traditionally used in German and English beers. Six-row barley was traditionally used in US beers, but both varieties are in common usage now. Distilled from green beer, whiskey has been made primarily from barley in Ireland and Scotland, while other countries have used
Wheat gluten (food) in Boston. All worked for years to popularize these pioneering products at the Erewhon retail store, and developed a trademark on the Wheatmeat name. While wheat gluten itself is rather flavorless, it holds a marinade very well and is usually simmered in a "dashi" (broth) made from soy sauce, kombu, ginger, and sometimes also sesame oil. Since the mid-20th century, wheat gluten (usually called seitan) has been increasingly adopted by vegetarians in Western nations as a meat alternative. It is sold in block, strip and shaped forms in North America, where it can be found in some supermarkets, Asian food