In general, there is no way to keep from developing food allergies. There is some evidence that breastfeeding lowers an infant's chance of developing food allergies later. Diagnosis of a food allergy begins with a medical history and physical exam. Some children who develop food allergies outgrow them. However, food allergies are usually lifelong conditions.
Effects range from abdominal discomfort to life-threatening anaphylaxis or death.
Foods that cause allergic reactions should be avoided. Food allergies are not contagious and pose no risk to others. Foods that cause an allergic response should be eliminated from the diet. It is important to read food labels carefully. Peanuts and milk, for example, are in many prepared foods.