![]() ![]() Symptoms might include wheezing, hives, cramps, and low blood pressure. Systems of the body involved could be respiratory, skin, gastrointestinal, and cardiovascular. An example of a systemic allergic reaction would be the multiple symptoms that are involved with a severe peanut allergy or perhaps in a bee sting allergy. True allergy, involving IgE, can be systemic or local in nature and presentation. Although involving the immune system, this syndrome does not involve IgE and is not a true food allergy. In this problem antibodies made from immunoglobulin IgA or IgG against the protein gluten cause gastrointestinal symptoms. This form of food related adverse reaction is called a food sensitivity or intolerance.Īn example of a food related syndrome that is immunologically mediated, but is not an allergy, could be Celiac disease. The sugar therefore sits in the bowel and eventually causes cramps and diarrhea. Some people cannot metabolize lactose properly due to a deficiency in the production of the enzyme lactase. ![]() However, only a true food allergy involves the IgE mechanism.Īn example of a physiologic food problem would be the adverse reaction some people have to milk sugar (lactose). There are other food related syndromes, some of which involve physiologic symptoms and some of which are based on other aspects of the immune system. IgE is the antibody that induces or mediates the food related symptoms. True allergy implies that the allergic reaction involves a part of the immune system called Immunoglobulin E (Ig E). It is sometimes called Pollen-Food Allergy Syndrome as the allergy to the food is a result of strong allergy to certain pollens. It is probably the most common form of food allergy, perhaps accounting for as much as 50% to 60% of all “true allergy” caused by food. ![]() Oral Allergy Syndrome is a form of food allergy in which raw or uncooked fruits and vegetables induce itching of the mouth and throat. ![]()
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