Family history is the strongest predictor of developing food allergies. Diagnosis can be made from skin testing, IgE serum (blood testing), or Food challenges. These methods can help identify the cause of allergic reactions. When it has been determined that you have a food allergy, Component allergy testing is a method that can help identify what part of the food protein may be the problem and determine how severe the reaction may be. Once identified, methods of avoidance and emergency treatment guidance can be discussed in case accidental ingestion should occur.