The first time you eat a food
that triggers an
allergic reaction, your body's immune system
recognizes the food as a foreign substance (allergen). Your
body reacts by developing
antibodies against the food. When you eat the
offending food again, the antibodies attack the allergen, releasing histamine
and other chemicals that cause the symptoms of an allergic reaction.
To learn more, see the Symptoms and Treatment Overview sections of this topic.
Sarah Marshall, MD - Family Medicine
Rohit K Katial, MD - Allergy and Immunology
March 9, 2011
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