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What happens in your body when you have a food allergy?

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When you eat something you are allergic to, your body makes antibodies. Over time, sometimes as soon as the second time you eat it, the antibodies spring into action, starting a process that includes the release of lots of histamine to fight what it believes is invading your body. Histamine is a powerful chemical that can affect your respiratory system, digestive tract, skin, and heart and blood vessels.

From: Food Allergies WebMD Medical Reference

SOURCES: 

News conference, National Institute of Allergy and Infectious Diseases, Dec. 3, 2010.

National Institute of Allergy and Infectious Diseases. 

The Food Allergy Initiative.

The Food Allergy and Anaphylaxis Network.

American College of Allergy, Asthma and Immunology.

Reviewed by Nayana Ambardekar on May 16, 2018

SOURCES: 

News conference, National Institute of Allergy and Infectious Diseases, Dec. 3, 2010.

National Institute of Allergy and Infectious Diseases. 

The Food Allergy Initiative.

The Food Allergy and Anaphylaxis Network.

American College of Allergy, Asthma and Immunology.

Reviewed by Nayana Ambardekar on May 16, 2018

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What are symptoms of a food allergy?

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