Adverse reactions to foods

Area of Science:

• Immunology
• Pharmacology
• Gastroenterology

Background:

• The discovery of immunoglobulin E (IgE) in the 1960s led to a prevailing belief that allergies underpin most adverse food reactions.
• Widespread popular literature on "food allergy" has created significant confusion among the public and medical professionals.
• Emerging evidence suggests that non-immunological mechanisms are responsible for the majority of adverse food reactions.

Purpose of the Study:

• To clarify the mechanisms underlying adverse food reactions.
• To differentiate between true allergic reactions and other forms of food intolerance.
• To address the confusion surrounding food allergy and food intolerance.

Main Methods:

• Review of existing literature on food allergy and food intolerance.
• Analysis of the role of small, non-immunogenic organic molecules in food.
• Comparison of immunological and pharmacological pathways in adverse food reactions.

Main Results:

• The majority of patients with food intolerance experience symptoms triggered by small, non-immunogenic organic molecules in food.
• These reactions are primarily pharmacological, not immunological.
• Some pharmacological reactions may share common pathways with allergic reactions, leading to similar symptoms.

Conclusions:

• Adverse food reactions are predominantly mediated by pharmacological mechanisms rather than IgE-mediated allergies.
• Further research is needed to fully understand these poorly understood non-immunological mechanisms.
• Distinguishing between food allergy and food intolerance is essential for appropriate patient management.