Generally foods that are eaten most often or foods that are craved are the ones that are the most suspect. In this country, dairy and wheat are the most suspect, in America corn is often the culprit and in the Far East where the diet is radically different rice and soy are the most common allergens. Because this type of problem is not a true allergy it can be treated. Any food that is eaten often should be removed from the diet for two weeks. At the same time it is essential to ensure that your child has an adequate quantity in essential nutrients.
Variety is a good remedy.
A problem for non-breast fed babies is that the friendly bacteria do not develop properly. Instead, harmful bacteria develop in their place. Dysbacteria produce toxins which irritate the walls of the intestines and make it more leaky. If a food to which your child is allergic is eaten again the response will be much greater, a hypersensitivity reaction will occur. For this reason it is not a good idea to experiment with wheat to see if your child has got over his or her allergy if he or she has Coeliac disease.