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Alan Khadavi, MD, APC
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April 7, 2023 by Alan Khadavi

Corn Allergy: Causes, Symptoms, and Treatment

Corn is a staple food that is widely used in the food industry, and it is a major component of many processed foods. However, some individuals may develop an allergy to corn, which can cause various symptoms ranging from mild to severe. In this article, we will discuss the causes, symptoms, and treatment of corn allergy.

Corn allergy occurs when the immune system reacts to the proteins found in corn. The immune system mistakenly identifies these proteins as harmful substances and releases chemicals such as histamine to fight them off. This can cause various symptoms such as itching, hives, swelling, and in severe cases, anaphylaxis.

There are various proteins found in corn that can trigger an allergic reaction. The most common allergen is called zein, which is a storage protein found in corn kernels. Other proteins found in corn include lipid transfer proteins, which can cause severe allergic reactions, and profilins, which can cause mild to moderate reactions.

The symptoms of corn allergy can range from mild to severe and can occur immediately after consuming corn or within a few hours. The symptoms may include:

  • Skin rash, itching, and hives
  • Swelling of the lips, tongue, and throat
  • Difficulty breathing, wheezing, and coughing
  • Stomach pain, nausea, vomiting, and diarrhea
  • Anaphylaxis, which is a severe and potentially life-threatening allergic reaction that can cause a sudden drop in blood pressure, difficulty breathing, and loss of consciousness.

Diagnosing corn allergy involves a combination of medical history, physical examination, and allergy testing. Your doctor may ask about your symptoms, the timing of the reaction, and the types of foods you have consumed.

Skin prick tests or blood tests can help confirm the presence of an allergy. During a skin prick test, a small amount of corn protein is placed on your skin, and the skin is pricked with a needle. If you are allergic, a raised bump will appear on the skin. Blood tests measure the amount of IgE antibodies in your blood, which are produced by the immune system in response to an allergen.

The best way to manage corn allergy is to avoid consuming corn and corn-based products. This can be challenging, as corn is used in many processed foods and may be listed under different names, such as maize, cornstarch, cornmeal, and corn syrup. Reading food labels carefully and avoiding foods that contain corn is essential for preventing allergic reactions.

If you accidentally consume corn and experience an allergic reaction, over-the-counter antihistamines can help relieve mild symptoms such as itching and hives. However, if you experience severe symptoms such as difficulty breathing, wheezing, or anaphylaxis, seek emergency medical attention immediately. Epinephrine injections may be required to treat severe allergic reactions.

Conclusion:

Corn allergy is a relatively rare but potentially serious condition that can cause various symptoms ranging from mild to severe. Avoiding corn and corn-based products is the best way to prevent allergic reactions. If you suspect that you may have a corn allergy, speak to your doctor about getting tested and developing an allergy management plan.

Anaphylaxis

Filed Under: Blog, Food allergy

alan-khadavi
Dr. Alan Khadavi
Allergy & Asthma Specialist

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