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What tests are used to diagnose food allergies?

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Your doctor may do a radioallergosorbent blood test (he may call it a RAST) to see how many antibodies your immune system makes. High levels of some antibodies can help your doctor spot specific food allergies.

You may also get an allergy skin test, also called a scratch test.

Some food allergies are very mild, and in difficult-to-diagnose cases, a promising new antibody test may help. More research is needed. Also, there are now genetic tests, especially for gluten and celiac (wheat, barley, rye, and some oats).

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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How are food allergies treated?

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