Food Allergy Assessment View Calculator About 1.5% of adults and up to 6% of children under age 3 in the U.S. (or about 4 million people) have a true food allergy. It usually isn't a 'new' food that causes an allergic reaction. People often develop an allergy to a food he/she has eaten many times. The most common food allergies in children are eggs, milk, peanuts, soy and wheat. Children typically outgrow their allergies to milk, eggs, soy, and wheat. Children usually will not outgrow allergies to peanuts, tree nuts, fish, or shrimp. The most common foods to cause allergies in adults are shrimp, lobster, crab and other shellfish, peanuts, walnuts, and other tree nuts, fish, and eggs. Unlike children, adults do not usually 'outgrow' or lose their food allergies. Take this quick assessment to learn the signs of food allergies and help you determine if you or your child is allergic to certain foods. Learn more about putting this calculator or other calculators on your website.