Wheat Allergy

NewsGuard 100/100 Score

Wheat allergy, a condition that affects millions of people, occurs when the immune system becomes sensitized to wheat and then overreacts when foods such as cereal, bread, pasta or pizza are eaten. Wheat is also found in drinks such as beer, which can also trigger an allergic reaction.

Gluten-free bread. Image Copyright: ChameleonsEye / Shutterstock
Gluten-free bread. Image Copyright: ChameleonsEye / Shutterstock

This type of allergy usually affects younger children, with around 65% growing out of it by the age of 12. Generally, people are at a greater risk of developing a wheat allergy if they have a family history of allergies such as asthma or eczema.

Wheat allergy is characterized by the activation of T helper type 2 (Th2) cells which are necessary for humoral immunity and play a pivotal role in coordinating the immune response. Such activation results in immunoglobulin E and non-immunoglobulin E mediated reactions (the latter representing much less understood pathophysiological mechanism).


A person with a wheat allergy is likely to experience symptoms of allergic reaction within minutes to hours after exposure to wheat. The symptoms that arise are usually mild, but people can also develop a severe and life threatening reaction called anaphylaxis. Accurate diagnosis and correct management of wheat allergy is therefore essential.

As is the case with other food allergies, the symptoms that may arise with a wheat allergy include the following:

  • Nausea and vomiting
  • Abdominal pain, diarrhea and indigestion
  • Asthma
  • Runny or congested nose
  • Sneezing
  • Headache
  • Anaphylaxis

If a person develops any of these symptoms after exposure to wheat, they should consult an allergist or an immunologist.


If a doctor suspects a person has a wheat allergy, they will ask about the person’s medical history and any family history of allergies. A skin-prick test and/or blood test may be arranged. For the skin-prick test, a small amount of wheat protein is placed on the skin of the back or arm, which is then pricked with a small probe to let the protein underneath the skin. If a small bump or hive then develops at this site, the person may have an allergy.

For the blood test, a sample is checked for the presence of immunoglobulin (IgE) antibodies to wheat proteins. Nevertheless, the presence of specific serum IgE antibodies to wheat without a history of symptoms after wheat exposure is not considered to be diagnostic as many people can be sensitive to wheat, but can tolerate wheat exposure (most notably in grass pollen sensitive individuals).

As certain symptoms can overlap (most notably from the gastrointestinal corner), a wheat allergy should be differentiated from “gluten intolerance” or celiac disease where the underlying pathophysiological mechanism is an abnormal immune reaction to gluten.


If a wheat allergy is diagnosed, foods that contain wheat such as bread and pasta should be avoided, as well as non-food products with ingredients containing wheat such as cosmetics. Foods that are not intended to contain wheat may become contaminated with it during manufacture or preparation and people with an allergy should also avoid any items that display a warning that the product was made or packaged in a place where wheat is also processed.

If exposure does accidentally occur, symptoms may be controlled with antihistamines or corticosteroids. Epinephrine is the only drug that can reverse anaphylaxis, which can arise within just seconds of exposure to wheat. When this occurs, the body releases a mass of chemicals that can cause constriction of the airways, a sharp fall in blood pressure and shock.

If a person is at risk of having a severe reaction, they will be prescribed an auto-injector and taught how to self-administer epinephrine. People should always ensure they have two doses available, since the reaction may recur. The medication should be taken as soon as a person suspects they have eaten a food containing wheat or if they start to experience symptoms of an allergic reaction such as a tight throat or trouble breathing.

Further Reading

Last Updated: Dec 30, 2022

Sally Robertson

Written by

Sally Robertson

Sally first developed an interest in medical communications when she took on the role of Journal Development Editor for BioMed Central (BMC), after having graduated with a degree in biomedical science from Greenwich University.


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Robertson, Sally. (2022, December 30). Wheat Allergy. News-Medical. Retrieved on May 17, 2024 from https://www.news-medical.net/health/Wheat-Allergy.aspx.

  • MLA

    Robertson, Sally. "Wheat Allergy". News-Medical. 17 May 2024. <https://www.news-medical.net/health/Wheat-Allergy.aspx>.

  • Chicago

    Robertson, Sally. "Wheat Allergy". News-Medical. https://www.news-medical.net/health/Wheat-Allergy.aspx. (accessed May 17, 2024).

  • Harvard

    Robertson, Sally. 2022. Wheat Allergy. News-Medical, viewed 17 May 2024, https://www.news-medical.net/health/Wheat-Allergy.aspx.


The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News Medical.
Post a new comment

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.

You might also like...
New clinical practice guideline offers evidence-based recommendations for managing inhalant allergies with immunotherapy