They need to learn a whole new system of food selection, meal preparation and planning. Staples foods such as milk, wheat, and eggs were often involved in causing the delayed patterns of food allergy and long-term success depends on creating an alternate diet that featured other staple foods. At least, these foods could not be considered as essential. The core-concept also made nutritional and economic sense. Human diets all over the world are based on a set of staple foods.
Most human beings rely on a few foods to supply most of their daily calories.
A return to simpler food intake may have important biological advantages. Bodies seem to work better when they have a simple, regular food supply - no surprises. The core of a new, healthy, modern diet should be a small number of staple foods. The food allergy literature identified cow's milk proteins, gluten, and egg white as three of the most allergenic components of staple food in North America. The top three are followed by nuts, soya, citrus, corn, and then a scattering of other foods.