Food allergies are immune reactions to food proteins. More than 90% of all food allergies are caused by eight foods: peanuts, soybeans, milk, eggs, fish, shellfish, tree nuts, and wheat. The U.S. Food and Drug Administration (FDA) requires declaration of the presence of these eight allergens on labels of food products under its jurisdiction. The U.S. Dept. of Agriculture does not require such listing on meat and poultry products but encourages similar declaration. The FDA allows only foods conta…