Food allergy is a reaction of the body immune system to the presence of the proteins in the body introduced through food. Allergic reactions can affect the skin (hives), gastrointestinal organs (nausea, cramps, diarrhea), respiratory system (attenuation) and circulation (drop in blood pressure). In extreme cases, anaphylaxis can occur.. In this case, death can occur within minutes. Food allergens are natural proteins that are resistant to the action of heat, proteolytic enzymes, and pH change. The immune system of an individual may react in a very small amount of allergen present (the amount expressed in ppm). Different individuals have different levels of sensitivity and specific response to the presence of the same allergen. Avoiding cont...