Common Food Allergens and Introduction Tips
The most common allergens include peanuts, tree nuts, eggs, milk, wheat, soy, fish, and shellfish. Current guidance supports introducing common allergenic foods during infancy once developmentally appropriate rather than routinely delaying them. Common allergens include peanut, egg, milk, wheat, soy, sesame, fish, shellfish, and tree nuts. Introducing one new allergenic food at a time can make it easier to identify a reaction, although there is no need to unnecessarily delay other foods once your child is tolerating them.
Introduce a new allergenic food in a small amount in the morning, so you can watch for a reaction during the day. Wait two to three days before introducing another new allergen. Possible food-allergy symptoms include hives, swelling of the lips or face, vomiting, coughing, wheezing, or difficulty breathing. Breathing difficulty, swelling of the tongue or throat, or symptoms involving multiple body systems can indicate a severe allergic reaction and require emergency medical attention.
Report adverse events to your healthcare provider or the relevant regulatory authority.
Toddlers with a family history of severe allergies, eczema, or existing food allergies should have allergen introduction guided by a pediatrician. Do not delay introduction on your own without medical advice, but do get that advice first if risk factors exist.