Corn Allergy: What to Eat and What to Avoid

Corn Allergy: What to Eat and What to Avoid

The corn allergy is not currently in the top 8 most common allergens in the US, but it is a growing allergy among both adults and children. A study performed in 2016 suggested that upwards of 1% of the adult population had an allergy to corn at varying levels of severity. A second study performed on only 50 people found that 6% of them had an diagnosed corn allergy. Safe to say, corn allergies are a growing concern.

Corn is a sneaky allergy in that it is so pervasive in our everyday lives, especially as a sweetener in the form of High Fructose Corn Syrup.

Corn is often found in baked goods, salad dressings and marinades, sauces, seasoning packets, frying oils, candy, and even on your take-out pizza.

Super allergic people may find that they can have a reaction to eating the meat and eggs of animals that are fed a corn-based diet.

Probably the biggest question after being diagnosed with a corn allergy is “What can I eat?”.

While living with a corn allergy can seem overwhelming and difficult, it isn’t insurmountable. Pinky promise.

Being Your Own Allergy Advocate

When I was first diagnosed with my plethora of allergies back in the early 1990s, the word allergy was not as prevalent as today, and people really didn’t understand what it meant. I had relatives asking if they could just scrape off the nuts on the dessert and that would be fine, right? For seemingly the millionth time, my parents would explain that wasn’t and would offer me a safe to eat treat instead.

Even as pervasive as the word is today, there are still people who don’t really “get” allergies. Therefore, it is so important for you to be your own allergy advocate. Teach your kids if they have allergies to stick up for themselves and say something.

And if you are certain something is wrong, don’t give up! My primary care physician was unconvinced I had developed a new allergy in my late 20s. He was ready to prescribe an anti-acid medication, assuming I was eating too much fast food. However, I was adamant in my knowing that something was wrong and went to a new allergy specialist. I had my blood checked and my IgE levels were off the charts! We did an elimination diet and saw immediate improvements in my health. Be your own advocate at the doctor’s office, and make sure you take someone with you to help navigate if you need.

Corn Allergy Safety in School and Work

If your child has a corn allergy, make sure to let both the school and their individual teachers know of their allergy. Any medication they might need, including an EpiPen if the reaction is severe, needs to be kept at the school in case of emergencies.

In elementary school, when they have assigned seating, it is easier to maintain a clean workspace for your child. As they go through middle and high school and beyond, make sure to have them wipe down the desk before they use it as there could be oils or crumbs on the desk after someone ate a granola bar, for example.

In a work environment, you should inform your coworkers of your allergy and ask them to not eat corn around you or your workspace, especially if your allergy is severe and anaphylactic. Making sure to wipe down surfaces is again important.

How to Read a Food Label with a Corn Allergy

Learning how to read food labels is one of the most important things you can do after developing a corn allergy. Always make sure that you read the entire label and not just quickly scan for “corn” as ingredients can hide under different names.

Sometimes companies will place advisory statements on their label to say things such as, “May Contain” or “Produced in the same facility as…”. These are not required by law but are placed there at the discretion of the company. Talk with your doctor about if you should avoid these food labels as well.

This label for Corn Flakes doesn’t have corn listen under the Allergens but has 2 instances of corn in the label. That’s why it is so important to always check the labels!

In general, I tend to avoid any and all food products that list my own allergies on these advisory statements. You never know if one day cleaning the machines, an allergen was totally washed away or not. I err on the side of caution with my health and suggest you do the same.

What to Avoid with a Corn Allergy

When looking at a food label, make sure that the ingredient list does not contain any of the following items. The list of foods to avoid is long, and while I’ve done my best to include them all here, I am sure there are more being made and discovered each day. If you know of an allergy name that I’ve missed, write it in the comments below and I’ll be sure to add it to the list!

  • Corn (fresh, canned, creamed, frozen, corn oil, popped corn, caramel, etc.)
  • Baby and Infant formulas
  • Baking powder
  • Breakfasts cereals such as Corn Flakes
  • Confectioners’ Sugar (also known as powdered sugar and 10X sugar)
  • Cornmeal
  • Corn starch
  • Corn syrup
  • Corn Sugars including: dextrose, dextrin, maltodextrin, fructose, Dyno, Cerelose, Puretose, Sweetose, glucose, sorbitol, sylitol, inositol, sodium erythorbate)
  • Food Starch
  • Fructose
  • Grits
  • Hominy
  • Maize
  • Mannitol
  • Margarine

Be careful in using the following items as they are often made using corn

  • Breaded or fried foods (cross contamination or corn oil)
  • Baking mixes
  • Cheese and cheese spreads
  • Chop Suey and Chow Mein
  • Caramel color (made with corn syrup)
  • Carbonated drinks such as pop and soda
  • Citric Acid (a mold grown in corn sugar)
  • Fish sticks
  • Fried items (if corn oil is used)
  • Fruits like apples and citrus (sprayed with a vegetable wax derived from corn)
  • Frozen Mixed Vegetables
  • Gravy (thickened with cornstarch)
  • Graham crackers
  • Hand Sanitizer (alcohol derived from corn)
  • Ice creams, sherbets
  • Instant coffee
  • Jams and jellies
  • Malt syrup
  • Modified food starch
  • Marshmallows
  • Milkshakes
  • Monosodium glutamate
  • Ketchup and mustard
  • Pancake Syrup
  • Pork and beans
  • Polenta
  • Supermarket meats (sprayed with lactic acid fermented in corn sugars)
  • Table Salt (made with dextrose)
  • Vanilla extract (can be made with corn syrup)

What You Can Eat with a Corn Allergy

After developing a new allergy, how you eat both at home and out and about is very likely going to change. Cooking at home is going to be the safest option for you and your family as you can ensure no allergens come into contact with the food and no cross contamination can occur. Make sure your diet is filled with simple whole foods, such as meats, grains, vegetables, fruits, beans, and lentils.

Living with allergies has gotten so much better in the past few years thanks to the requirements of labeling all food in grocery stores, as well as the sheer quantity of allergy free alternatives available in most stores.

The main challenge when being allergic to corn is where it is used as a sweetener and a thickening agent. Look for products and foods that do not contain these items.

It is possible that you are allergic to corn, but are still able to eat things with high fructose corn syrup. This is because after manufacturing the corn syrup the zein, the protein that causes the majority of corn allergies, is removed. If you are allergic to corn, you may not be allergic to high fructose corn syrup. As always, if you want to try a food allergy, make sure that you do a food challenge under the supervision of your doctor.

Some of the best swaps for soy allergies are other grains.

Brown rice syrup can be used in place of corn syrup to make sweets and candies.

Arrowroot starch, tapioca flour, and white rice flour can all be used as a thickener in sauces and gravies. They can also be used when combined with wheat flour to make a safe cake flour. Simply remove 1 tablespoon of wheat flour and add 1 tablespoon of tapioca flour.


Eating Out with Corn Allergies

Perhaps the biggest change to your life with a corn allergy will come from the options available to you when dining out. No longer can you just go grab a quick bite to eat, nor will you be able to freely eat at a friend’s house.

The best way to avoid (or at least try to avoid) getting sick at restaurants is to research ahead of time. Most restaurants post their menus online, which gives me a chance to figure out if this restaurant would be a safe option. Even if the menu says “allergy friendly” you still should research, because it is really difficult to ensure that a chef or kitchen will wipe off any surfaces, open new bags of ingredients, or even use a different set of gloves when preparing food.

For corn allergies in particular it is important to ask the restaurant what oil they use to fry their food. Often places will use soy or vegetable oil which includes corn in the blend. You also need to ask if there are any items that go into the fryer that contain corn as you don’t want to have the risk of cross contamination via the oil.

When dining at a friend’s house, I will always ask if I can bring an option that is wheat allergy safe. Follow this link for an article that shares ideas for talking with your family and friends about your allergies.

Other Hidden Sources of Corn Not In Food

Beyond food, there are places that corn can hide, making you sick even though you don’t eat corn anymore! While you won’t be eating these things, you should be aware that a reaction can occur from touching or smelling corn. These hidden corn places include:

  • Medications (make sure you talk to your doctor before stopping medications and ask about switching to a different medication!)
  • Adhesives on envelopes, stickers, stamps, etc
  • Paper containers
  • Food wrappers
  • Disposable straws
  • Toothpaste
  • Laundry starch
  • Surgical gloves
  • Pet food
  • Crayons
  • Dish washer soap
  • Shampoo
  • Paint
  • Dextrose intravenous solution

Make sure you check these places and use the list above to make sure that you and your family are safe from these hidden corn sources!

Have other allergies? Check out these articles to learn more

Wheat Allergy: What to Eat and What to Avoid

Vegan and Gluten Free Chocolate Cake

Dairy Allergy: What to Eat and What to Avoid

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