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How is a double-blind food challenge done to diagnose food allergies?

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The double-blind food challenge has become the gold standard of allergy testing. Various foods, some of which are suspected of causing an allergic reaction, are each placed in individual opaque capsules. You swallow a capsule and your doctor watches you to see if you have a reaction to the food. You repeat the process until you've swallowed all of the capsules. In a double-blind test, neither the patient nor the doctor knows which capsule contains the allergen.

SOURCES:

The National Institute of Allergy and Infectious Diseases: "Fact Sheet: Food Allergy and Intolerances."  UpToDate. American Academy of Allergy Asthma & Immunology.

Reviewed by Brunilda Nazario on October 29, 2018

SOURCES:

The National Institute of Allergy and Infectious Diseases: "Fact Sheet: Food Allergy and Intolerances."  UpToDate. American Academy of Allergy Asthma & Immunology.

Reviewed by Brunilda Nazario on October 29, 2018

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