What is the Difference Between Food Allergy and Food Intolerance?

Overview

While food allergy and food intolerance might sound the same, there are important differences to note between them.

Food Allergy:

• Food allergy is an adverse reaction to a specific food antigen, usually harmless to most people, that occurs in individuals who are susceptible to that specific allergen.
• It is an immune-mediated response, meaning it involves the body's immune system.
• Symptoms of food allergy can range from mild to severe and may include wheezing, coughing, shortness of breath, itching, vomiting, stomach cramps, swelling of the tongue, and dizziness.
• In rare cases, a severe allergic reaction called anaphylaxis can occur, which is a potentially life-threatening condition.

Food Intolerance:

• Food intolerance refers to non-immune reactions caused by non-allergic and non-immune mechanisms.
• It is typically due to disturbances in the metabolism of a specific food component, such as the lack of an enzyme needed for its digestion.
• Lactose intolerance is an example of food intolerance, where individuals lack the enzyme lactase needed to break down lactose (a sugar found in milk).
• Symptoms of food intolerance can be similar to those of food allergy but are generally less severe.

Here are the similarities between food allergy and food intolerance:

• Both food allergy and food intolerance can cause symptoms such as stomach cramps, vomiting, and diarrhea.
• They can both be triggered by certain foods or food components.

Differences between food allergy and food intolerance include:

• Food allergy involves an immune response, while food intolerance does not.
• Food allergy symptoms can range from mild to severe and may include respiratory symptoms like wheezing and shortness of breath. In contrast, food intolerance symptoms are generally less severe and do not involve respiratory symptoms.
• Food allergies can lead to a potentially life-threatening reaction called anaphylaxis, whereas food intolerances do not.
• The prevalence of food allergy is estimated to be around 12% in adults and less than 10% in children. On the other hand, food intolerance is estimated to affect up to 20% of the population.
• Diagnosis and management strategies for food allergy and food intolerance differ due to their distinct pathophysiological mechanisms. It is important for individuals experiencing symptoms to consult with a healthcare professional for proper evaluation and guidance.