4 doctors weighed in:

Has anyone ever had a blood test to screen for food allergies?

4 doctors weighed in
Dr. Gary Steven
Internal Medicine - Allergy & Immunology
1 doctor agrees

In brief: Not reliable

The gut has its own immune system to suppress immune reactions to foods; you can have a positive ige blood test to foods to which you don't react (false positive).
Commonly available igg tests have no correlation with allergic reactions to foods. The best way to diagnose food allergies is to have an allergist take a comprehensive history of food-associated reactions, and do skin tests to confirm.

In brief: Not reliable

The gut has its own immune system to suppress immune reactions to foods; you can have a positive ige blood test to foods to which you don't react (false positive).
Commonly available igg tests have no correlation with allergic reactions to foods. The best way to diagnose food allergies is to have an allergist take a comprehensive history of food-associated reactions, and do skin tests to confirm.
Dr. Gary Steven
Dr. Gary Steven
Thank
Dr. Andrew Murphy
Internal Medicine - Allergy & Immunology

In brief: See below

Blood testing to screen for food allergy is not the way to diagnose food allergy.
Food allergy diagnosis is made by obtaining a history from the patient and making a decision that the story is c/w food allergy reaction. If the clinical story is appropriate then skin testing and / or food testing for food allergy can be done.

In brief: See below

Blood testing to screen for food allergy is not the way to diagnose food allergy.
Food allergy diagnosis is made by obtaining a history from the patient and making a decision that the story is c/w food allergy reaction. If the clinical story is appropriate then skin testing and / or food testing for food allergy can be done.
Dr. Andrew Murphy
Dr. Andrew Murphy
Thank
Dr. Jeffrey Rumbyrt
Internal Medicine - Allergy & Immunology

In brief: Yes

This is called "rast" testing.
Though generally not as accurate as skin testing, blood allergy testing can be done in young children or in adults that are taking medications that would interfere with skin testing. It is also used in patients with skin problems that would prevent them from having skin testing.

In brief: Yes

This is called "rast" testing.
Though generally not as accurate as skin testing, blood allergy testing can be done in young children or in adults that are taking medications that would interfere with skin testing. It is also used in patients with skin problems that would prevent them from having skin testing.
Dr. Jeffrey Rumbyrt
Dr. Jeffrey Rumbyrt
Thank
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