As a good parent who has little concern for the underlying mechanism of allergy but who is concerned for the health of your child, the good news is that it is possible to prevent allergies. The younger your child is the better. The most important thing is to breast feed your child for the first six months of life. And then introduce foods in the appropriate order. A food ingredient that can cause serious damage to your child's health is wheat.
Many parents introduce wheat far to early.
Wheat contains a protein called gluten. Gluten is difficult to digest and because it has an abrasive effect it can cause damage to the intestines. Wheat should not be introduced into the diet until the child is about twelve months old. Ideally it should be alternated with other grains. Wheat is found in very many foods and it is possible to give a child wheat at every meal from breakfast to supper.