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Common Food Allergies

Wheat Allergy

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About Wheat Allergy

When someone is allergic to wheat, the body’s immune system, which normally fights infections, overreacts to proteins in the wheat. When the person eats something made with wheat, the body thinks that these proteins are harmful invaders.

The immune system responds by working very hard to fend off the invader. This causes an allergic reaction, in which chemicals like histamine are released in the body. The release of these chemicals can cause someone to have these symptoms:

  • wheezing
  • trouble breathing
  • coughing
  • hoarseness
  • throat tightness
  • stomachache
  • vomiting
  • diarrhea
  • itchy, watery, or swollen eyes
  • hives
  • red spots
  • swelling
  • a drop in blood pressure, causing lightheadedness or loss of consciousness

Allergic reactions to wheat can differ. Sometimes the same person can react differently at different times. Some reactions can be very mild and involve only one system of the body, like hives on the skin. Other reactions can be more severe and involve more than one part of the body.

Wheat Allergy and Celiac Disease Are Different

An allergy to wheat involves an allergic response to a protein in wheat. Gluten is one of the wheat proteins that can cause an allergic reaction. Gluten is also involved in a condition called celiac disease.

It’s easy to confuse celiac disease with wheat allergy, but they are very different. Celiac disease does not cause an allergic reaction. With celiac disease, there is a different type of immune system response in the intestines, causing a problem with the absorption of food.

While people with wheat allergy can usually eat other grains, people with celiac disease cannot eat any food containing gluten. Gluten can be found in other grains such as barley, rye, and sometimes oats.

Anaphylaxis Is a Life-Threatening Reaction

Wheat allergy can cause a severe allergic reaction called anaphylaxis. Anaphylaxis can begin with milder symptoms, but then can quickly worsen, leading to someone having trouble breathing or passing out. If it is not treated, anaphylaxis can be life threatening.

If your child has been diagnosed with a life-threatening wheat allergy (or any kind of life-threatening food allergy), the doctor will want him or her to carry an epinephrine auto-injector in case of an emergency.

An epinephrine auto-injector is a prescription medicine that comes in an easy-to-carry container about the size of a large marker. It’s simple to use. If your child needs to have it on hand, your doctor will show you how to use it.

Kids who are old enough can be taught how to give themselves the injection. If they are responsible for carrying the epinephrine, it should be nearby, not locked in a locker or in the nurse’s office.

Wherever your child is, adult caregivers should always know where the epinephrine is, have easy access to it, and know how to give the shot. Staff at your child’s school should know about the allergy and have an action plan in place. Your child’s rescue medications (such as epinephrine) should be accessible at all times.

If your child starts having serious allergic symptoms, like swelling of the mouth or throat or difficulty breathing, give the epinephrine auto-injector right away. Seconds count during an episode of anaphylaxis. Then call 911 or take your child to the emergency room. Your child needs to be under medical supervision because even if the worst seems to have passed, it’s common for a second wave of serious symptoms to occur.

It’s also a good idea to carry an over-the-counter (OTC) antihistamine for your child as this can help treat mild allergy symptoms. Use antihistamines after — not as a replacement for — the epinephrine shot during life-threatening reactions.

Living With Wheat Allergy

If allergy testing shows that your child has a wheat allergy, the doctor will provide guidelines on how to stay safe. Wheat allergy is more common in kids than adults, and many children seem to “outgrow” their wheat allergy over time.

But if your your child has wheat allergy, he or she must completely avoid products made with wheat. Although most allergic reactions to wheat occur after eating a wheat product, sometimes people can react to raw wheat that they breathe in (such as a baker who inhales flour in the workplace).

Natural food stores and the health food section in grocery stores usually have safe alternatives, including wheat-free breads, crackers, and breakfast cereals. Also, look for substitute flours made from potato, rice, soy, barley, oats, and corn.

For detailed information, you can visit websites that your doctor recommends, such as the Food Allergies and Anaphylaxis Network.

Manufacturers of foods sold in the United States must state in understandable language whether foods contain any of the top eight most common allergens: wheat, milk, egg, fish, crustacean shellfish, peanuts, tree nuts, and soy.

The label will include “wheat” in the ingredient list or say “Contains wheat” after the list. This label requirement makes things a little easier. But you still may want to learn the names of some common ingredients, such as durum, that mean wheat.


Cross-contamination means that the allergen is not one of the ingredients in a product, but might have contaminated it during production or packaging. Companies are not required to label for cross-contamination risk, though some voluntarily do so. You may see advisory statements such as “May contain wheat,” “Processed in a facility that also processes wheat,” or “Manufactured on equipment also used for wheat.”

Since products without precautionary statements also might be cross-contaminated and the company simply chose not to label for it, it is always best to contact the company to see if the product could contain wheat. You might find this information on the company’s website or you can contact a company representative via email.

It’s also important to remember that “safe” foods could become unsafe if food companies change ingredients, processes, or production locations.

Eating Away From Home

When your child eats in a restaurant or at a friend’s house, find out how foods are cooked and exactly what’s in them. It can be hard to ask a lot of questions about cooking methods, and to trust the information you get. If you can’t be certain that a food is wheat-free, it’s best to bring safe food from home.

Watch for cross-contamination, as wheat can get into a food product because it is made or served in a place that uses wheat in other foods. This can happen on kitchen surfaces and utensils — everything from knives and cutting boards to a toaster or grill. Fried foods often have the potential to be cross-contaminated, because they can be fried in the same oil as foods that contain wheat.

Also talk to the staff at school about cross-contamination risks in the cafeteria. It may be best to pack lunches at home so you can control what’s in them.

Here are some other precautions to take:

  • Don’t feed your child cooked foods you didn’t make yourself — or anything else with unknown ingredients.
  • Tell everyone who handles the food — from relatives to restaurant waitstaff — that your child has a wheat allergy.
  • Make school lunches and snacks at home where you can control the preparation.
  • If the manager or owner of a restaurant is uncomfortable about your request for wheat-free food preparation, don’t eat there.

Reviewed by: Larissa Hirsch, MD
Date reviewed: September 2012