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Thanksgiving is the one meal of the year most American households still cook from scratch, which means nearly every ingredient on the table started in a package someone can still hand you. That is a real advantage, and most families we talk with never think to use it.
In our San Antonio clinics, patients' reaction stories rarely involve the turkey. They cluster around dessert, usually starting with a serving knife that moves from the pecan pie to the pumpkin pie while three people talk.
Food allergies are immune responses to specific food proteins, and a very small amount of protein can trigger an allergic reaction. The FDA requires labeling of nine major allergens on packaged foods it regulates: milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans, and sesame.
About 5.8% of U.S. children and 6.2% of adults have a diagnosed food allergy, according to NCHS data published in January 2023. In a gathering of twenty people, that is usually more than one plate that needs attention.
The holiday adds three conditions a normal Tuesday doesn't have: food cooked by people who don't usually cook for you, serving utensils shared across eight dishes, and a four-hour grazing window where nobody tracks what touched what.
The question we field most often the week before Thanksgiving is some version of, "Can I just pick the pecans off the top?" We say no every time, and we completely understand why people keep asking. But the easiest way to confirm your diagnosis is to get tested.
An oral food challenge takes a scheduled half-day under supervision, so we can't fit it into the week of a gathering.
For people already diagnosed, the treatment options have widened. We have written about
food allergies and Xolair and about
newer allergy treatments now reaching patients.
Classic
Thanksgiving foods aren't unusually dangerous on their own. They're worth a second look because several contain milk, wheat, soy, or eggs in places the dish's name doesn't hint at.
| Dish on the table | What often sits inside it |
|---|---|
| Pre-basted or self-basting turkey | Milk or soy protein in the injected solution |
| Gravy, packet or pan-made | Wheat flour, milk, soy |
| Cornbread dressing and stuffing | Wheat, egg, milk, poultry broth |
| Green bean casserole | Milk, wheat, soy in the fried onion topping |
| Sweet potato casserole | Pecans, butter, gelatin, and sometimes egg in marshmallow |
| Pie crust and filling | Wheat, egg, milk, tree nuts |
| Raw vegetable tray with dips | Milk and egg in creamy dips, sesame in hummus |
Here is the part that surprises people. The federal labeling law that creates the "Contains" statement applies to FDA-regulated foods.
Meat and poultry fall under the USDA, and for those products, a plain-language allergen statement is voluntary rather than required, though every ingredient still has to be declared somewhere on the label.
So the box of stuffing mix will tell you plainly. The turkey may make you read the fine print for the soy or milk in its basting solution. Buying a plain fresh bird with a short ingredient list takes that whole question off the table.
Cross-contact is the other half.
American College of Allergy, Asthma and Immunology guidance notes that even a tiny amount of food, too small to see on a spoon or spatula, can trigger a reaction in a sensitive person.
If you're cooking, the order matters more than any single precaution. Prepare allergen-free dishes first, on clean surfaces, before you bring out the flour, butter, and nuts.
One practical note from our side: the dessert table is where this tends to slip, because it sits out the longest and gets the least supervision. Plating an allergy-safe dessert separately, before anyone sits down, solves most of it.
If you would like a clearer picture of what your family is working with before the next holiday, our team can help. We can talk through testing options and what your results actually mean.
As a guest, you have less control, so plan ahead. Call the host during the week before, rather than asking in the kitchen while they are managing a timer.
A San Antonio aside that has little to do with the dinner itself: mountain cedar starts releasing pollen here in mid-December, usually after the first real cold front. Some people who react to raw fruit or raw vegetables on the appetizer tray have pollen food allergy syndrome rather than a true food allergy, and the same proteins are involved. If raw carrots and apples bother your mouth every winter, raise that connection with an allergist.
For cedar itself,
we most often discuss allergy shots as the long-term option with San Antonio patients.
Write down the plan before the day, and tell one other adult in the house where the auto-injectors are. That is the single most useful thing you can do in advance.
The ACAAI describes anaphylaxis as symptoms that come on suddenly and can progress quickly, including hives, swelling of the throat or face, wheezing or chest tightness, trouble breathing or swallowing, vomiting or stomach cramping, a hoarse voice, dizziness, and a feeling that something is badly wrong. Symptoms vary between people and between reactions, and the absence of any one of them does not rule anaphylaxis out.
Epinephrine is the first-line treatment for anaphylaxis, and the 2023 ACAAI and AAAAI practice parameter advises giving it at the first sign of a suspected reaction rather than waiting to see how things develop. Antihistamines are not a substitute for it.
Our blog covers how food allergies are diagnosed in more detail. Call 911 if symptoms are severe, not improving, or worsen after epinephrine.
Your action plan should come from your allergist, be tailored to your situation, and be reviewed with them before the holidays, not after.
See an allergist for any suspected food reaction or any food you've avoided for years after a single bad evening. Both are common reasons people come to us in January.
A word of caution: not all “food allergy” testing is beneficial. People frequently buy online "food sensitivity" panels that measure IgG antibodies around the holidays, and both NIAID guidelines and ACAAI say they shouldn't be used to diagnose food allergy. IgG reflects exposure to a food. People cut out eight foods based on one of those reports, and we spend the first visit putting most of them back in.
A proper evaluation starts with your history, then skin prick or specific IgE blood testing, and sometimes a supervised oral food challenge, which NIAID describes as the most definitive method.
Apex Allergy and Asthma is a locally owned allergy, asthma, and immunology practice in San Antonio, and we regularly evaluate food allergies. We see children and adults at both clinics.
If you do one thing after reading this, pull your auto-injectors out of wherever they live and read the date on the side. That takes a minute, and November is the month for it.
Then call whoever is hosting. The conversation is easier in the first week of the month than it is on the day itself, and most hosts want to get it right.
We also offer multiple types of testing; you can read about them here.
Book an appointment, and we will start with your history, rather than a panel of twenty foods you have never had trouble with
Milk, wheat, egg, soy, and tree nuts show up most often, usually in dishes whose names don't mention them. Gravy and stuffing commonly contain wheat and milk; sweet potato casserole often contains pecans; and green bean casserole contains milk, wheat, and soy in the fried onion topping.
Yes. Self-basting and pre-basted turkeys are often injected with a solution containing milk or soy protein. The USDA regulates meat and poultry, and plain-language allergen statements are voluntary, so read the full ingredient list. A plain fresh turkey with a short ingredient list avoids the question.
Most IgE-mediated reactions begin within minutes to about two hours after eating, and anaphylaxis often starts within minutes. Timing varies between people and between reactions, so ACAAI advises treating a suspected reaction at the first sign rather than waiting to see what develops.
Skin prick and blood IgE tests are useful, but they produce false positives often enough that a result alone doesn't confirm or clear a food. Allergists read them against your reaction history, and a supervised oral food challenge remains the most definitive method when the picture is unclear.
It may be pollen food allergy syndrome, a cross-reaction between pollen proteins and proteins in raw fruits and vegetables. AAAAI notes that cooking usually changes those proteins enough that people tolerate the cooked version. Reactions beyond the mouth deserve prompt evaluation by an allergist.
This article is educational and is not medical advice. Talk with your allergist or primary care provider about your own symptoms, testing, and emergency action plan.
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Mark C Stahl, DO
Mark C Stahl, DO
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