The External Exposome and Food Allergy

Area of Science:

• Environmental Health
• Immunology
• Allergy Research

Background:

• Childhood food allergy prevalence is rising, indicating a significant role for environmental factors.
• The external exposome, encompassing various environmental exposures, is under investigation for its impact on food allergy development.

Purpose of the Study:

• To review current knowledge on the external exposome's role in food allergy.
• To synthesize findings on environmental exposures contributing to food allergy development in children.

Main Methods:

• Literature review of studies investigating environmental exposures and food allergy.
• Analysis of evidence linking house dust, microbial products, fungal allergens, chemicals, and air pollutants to food sensitization and allergy.

Main Results:

• Non-oral exposure to food antigens in house dust is associated with food sensitization and allergy.
• Co-exposure to microbial products and fungal allergens in house dust may promote allergic sensitization.
• The impact of endotoxin exposure is debated, while chemicals and air pollutants require further study regarding their role in food allergy.

Conclusions:

• Environmental exposures significantly influence the risk of developing food allergies.
• Identifying critical early-life environmental exposures is essential for understanding and potentially preventing food allergies.