When the immune system of a person makes a mistake, then food allergy occurs. Immune system of body protects us from germs and diseases. It makes antibodies that help to fight against the germs of bacteria, viruses and other germs that make us sick and weak. If anybody is facing this problem of food allergies, then it is sure that his/her immune system is not working well. There are different kinds of food allergies, like medicine allergies from penicillin, pollen allergy by polluted air and other food allergies with foods, like peanuts. In year 2006, a company named FAAN raised funds to control food allergies. There are more than twelve million children and adults in the world who have food allergies.

Another name of food allergy is food intolerance, and almost all persons get affected at some point with this allergy. Most of the times, people eat something, and then they feel unpleasant with the reaction of that food. According to new research, one out of three people have food allergy. Most of the family members also have food allergies and it all happens due to unpleasant reaction of different foods that has necessitated a change in their diet. Another further research on food allergies tells that 1% of adults and 3% of children have clinically proved allergic reactions to food.

It is very important to know that how do the allergic reactions to food works? Many allergens exist in different foods and those food components are responsible for an allergic reaction in the children or adult. These allergic reactions in the foods are proteins that usually resist the heat of cooking, the acid in the stomach, and the intestinal digestive enzymes, and this mechanism of food allergy involves the immune system and heredity.

There are many symptoms, which can be seen about the food allergy. Almost all the food allergy symptoms in a children or adult occur within a few minutes to an hour, after eating a food. Another great symptom of food is that, initially the person feels an itching in the mouth and difficulty in swallowing and breathing. Most of the popular food symptoms are nausea, vomiting, diarrhea, and abdominal pain. Incidentally, gastrointestinal symptoms are those symptoms which are most often confused with the symptoms of different types of food intolerance.