When living with asthma, understanding the factors that can trigger or worsen symptoms is an important part of managing the condition. Asthma triggers vary greatly from person to person and may include environmental factors such as pollen, dust, smoke, strong odors, weather changes, and seasonal allergies. However, for some individuals, certain foods, food allergies, and chemical additives may also contribute to breathing difficulties or other asthma-related symptoms.
As seasons change, allergies and other respiratory conditions can shift, sometimes making asthma symptoms harder to control. During these times, it’s especially important to watch for potential triggers and notice how your body responds to different foods and ingredients. While food itself is rarely a direct cause of an asthma attack, food allergies and sensitivities to certain chemicals or additives can cause reactions that may worsen asthma symptoms in susceptible individuals.
People living with asthma may want to know about several common food additives and naturally occurring chemicals, especially if they have noticed a connection between certain foods and their symptoms. Understanding where these substances are commonly found and learning how to identify them on food labels can make it easier to avoid potential triggers.
1. MSG
MSG is a naturally occurring chemical that is added to foods to increase flavor. It is typically found in snack foods, gravy, stock cubes, soy sauce, and packaged soups. Allergies to MSG are common, and those living with asthma who are susceptible to this allergy should be cautious when consuming foods with the flavorful additive.
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2. Sulphites
These chemicals are often added to foods as preservatives and are commonly found in wine, canned fish, fruit juices and dried fruit. Limiting wine consumption, eating fresh fruits and seafood, and limiting processed fruit juices will help you avoid asthmatic triggers.
3. Salicylates
Salicylates are also naturally occurring and are present in many foods, including tomato paste and sauce, instant coffee, soy sauce, honey, and beer. It is estimated that about 10 percent of people living with asthma also have an allergy to salicylates, so it is best for individuals within this group to avoid these foods or find alternatives that are free of the chemical.
Food triggers affect about five percent of those living with asthma. Doing research, reading food labels, and being aware of potential allergens are great ways to enjoy food without worrying about airways closing up.
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Food Allergies and Asthma
Let’s clear something up: there’s a big difference between a food allergy and a food sensitivity. If you have a true food allergy, your immune system reacts, and that can mean anything from mild hives or swelling to a severe, life-threatening reaction called anaphylaxis. If you have asthma, an allergic reaction can also make it harder to breathe and affect your airways.
Common food allergens include peanuts, tree nuts, milk, eggs, soy, wheat, fish, and shellfish. If you know you have a food allergy, it’s important to avoid your trigger foods and learn how to spot the signs of a reaction. If you have both asthma and food allergies, talk with your healthcare provider about an emergency action plan so you know exactly what to do if a reaction happens.
Reading Food Labels Can Help
One of the easiest ways to stay aware of possible food triggers is to make a habit of reading food labels. Packaged foods can hide all sorts of ingredients, preservatives, flavor enhancers, and other additives that aren’t always obvious.
When you’re shopping, don’t just trust what’s on the front of the package—flip it over and read the full ingredient list. If you know a certain ingredient has caused you problems before, learn its different names so you can spot it more easily. And when you’re eating out, don’t be afraid to ask about what’s in your food and how it’s prepared, especially if you have a known food allergy.
You don’t have to avoid every single additive just because you have asthma. The goal is to identify your own triggers, not cut out foods you don’t need to.
Keeping Track of Symptoms
Because asthma triggers differ for everyone, tracking your symptoms can help you spot patterns. Try keeping a food and symptom journal—write down what you ate, how much, when your symptoms started, and what those symptoms were.
It also helps to jot down any other possible triggers at the same time. Maybe it’s pollen, exercise, cold air, smoke, or strong smells that are causing your symptoms—not just food. Looking at the bigger picture can help you and your healthcare provider determine whether food is really the culprit.
Managing Asthma Beyond Food
Food triggers can affect some people with asthma, but they’re just one piece of the puzzle. To keep your asthma under control, you need to know all your triggers, take your medications as prescribed, and stick to your asthma management plan.
Don’t stop taking your asthma medication just because you think you’ve found a food trigger. Avoiding that food might help, but it’s not a substitute for proper asthma treatment.
If you notice that a certain food keeps causing you to wheeze, cough, feel tightness in your chest, or get short of breath, don’t try to figure it out alone. Talk to your healthcare provider—they may recommend allergy testing or another assessment based on your symptoms and medical history.
Food triggers only affect a small number of people with asthma, but if you’re sensitive, it matters. You can make smart choices about your diet by learning about possible allergens and additives, reading food labels, tracking your symptoms, and talking things over with your healthcare provider.
The key here is awareness, not fear. Most people with asthma can enjoy a wide variety of foods without any trouble. When you know your own triggers and have a plan for managing your asthma, you’ll feel more confident whether you’re eating at home, dining out, or facing a change in seasons—all while taking care of your breathing.