Food Intolerance vs. Food Allergy
See Related Pages
- AERD: Aspirin Exacerbated Respiratory Disease
- Allergies and Asthma at School – Resources for Parents and Schools
- Allergic March
- Alpha-1 Antitrypsin Deficiency
- Celiac Disease
- Chronic Idiopathic Urticaria – CIU
- Cold Urticaria
- Coronavirus | COVID-19 Information
- Eosinophilic Esophagitis
- Food Intolerance vs. Food Allergy
- FPIES – Food Protein-Induced Enterocolitis Syndrome
- GERD – Gastroesophageal Reflux Disease
- Hereditary Angioedema
- Immunotherapy for Allergies
- Infections and Viruses
- Interstitial Lung Diseases
- Mast Cell Diseases
- Nasal Polyps
- Oral Allergy Syndrome (OAS)
- PANDAS – Pediatric Autoimmune Neuropsychiatric Disorders Associated with Streptococcal Infections
- Primary Immunodeficiency Diseases (PIDD)
- Pulmonary Hypertension
- Respiratory Syncytial Virus – RSV
- Shared Decision Making
- Sleep Apnea
- VCD – Vocal Cord Dysfunction
It’s important to know the difference between a food intolerance and a food allergy, as each is managed differently.
What is food intolerance?
A food intolerance involves the digestive system. Due to an enzyme deficiency or chemicals in the food, the meal is not “broken down” correctly in the body and causes stomach distress.
Discomfort comes on gradually and may include:
- stomach pain
You may also just feel short-tempered.
With a food intolerance, you may be able to eat small amounts of the food but have problems when you eat a lot of the food.
What foods cause food intolerance?
The most common food intolerance is to lactose intolerance. Lactose is a sugar found in milk and other dairy products.
Some people are intolerant of sulfites or food additives.
A food allergy impacts the immune system and can be very serious. Your body recognizes the food as an “intruder” and mounts an “attack” to defend itself: the immune system overreacts and releases IgE antibodies.
The allergic reaction usually comes on very quickly, and while symptoms can be mild, they can also quickly turn life-threatening.
Symptoms of a severe allergic reaction (anaphylaxis) usually involve more than one body organ
- skin rash
- swelling, often around the mouth, on the tongue or in the throat
- shortness of breath
- stomach pain
- weak pulse
Eight food categories cause 90 percent of the allergic reactions to foods:
- tree nuts
- cow’s milk
What is the difference between food intolerance vs. food allergy?
This chart explains the ways food intolerance and food allergy are different:
How is food intolerance treated?
People with food intolerance can feel very uncomfortable and should see their healthcare provider for guidance. There are some medications and digestive enzymes that can help.
If it’s a food allergy, it’s important to avoid the food that causes the allergy – and always carry epinephrine auto-injectors in case of an accidental exposure. If you or your child show signs of a life-threatening allergic reaction, use epinephrine and then call 911 to go to the emergency department.