Food allergy affects up to 6 - 8% of children under the age of 3 and 2% of adults. People often have an unpleasant reaction to something they ate and wonder if they have a food allergy. One out of three people either believe they have a food allergy or modify their or their family's diet. Thus, while food allergy is commonly suspected, health care providers diagnose it less frequently than most people believe.

This difference between the clinically proven prevalence of food allergy and the public perception of the problem is due, in part, to reactions called "food intolerances," rather than food allergies. (Food intolerance is more common than food allergy.) A food allergy, or hypersensitivity, is an abnormal response to a food. The response is triggered by the immune system. However, the immune system does not cause symptoms of food intolerance, even though they may resemble those of a food allergy.

If you suspect a food allergy, call your doctor for an appointment. If you or your child have true food allergies, it is extremely important for you to identify them and prevent allergic reactions. Food allergy reactions can, in some cases, be fatal. Treatment is basically avoiding the food(s) after it is identified.

For more information on food allergies, visit the Food Allergy Network at

Read more about food allergies:

Created by the National Institute of Allergy and Infectious Diseases. Modified and updated by A.D.A.M., Inc. Illustration copyright A.D.A.M., Inc.


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Review Date: 4/4/2007

Reviewed By: Alan Greene, M.D., F.A.A.P., Department of Pediatrics, Packard Children's Hospital, Stanford University School of Medicine; Chief Medical Officer, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

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