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Adverse reactions to food additives
1Allergy and Immunology Section, Louisiana State University Health Sciences Center, Shreveport, Louisiana 71130-3932, USA.
Summary
Adverse reactions to food additives are likely underdiagnosed. Oral challenge testing is the definitive method for identifying offending agents, with avoidance being the primary management strategy.
Area of Science:
- Food science and toxicology
- Clinical immunology and allergy
Background:
- Food additives are prevalent in the food industry.
- Adverse reactions to food additives are potentially underdiagnosed due to low suspicion.
Purpose of the Study:
- To review literature on food additive classification and adverse reactions.
- To propose a practical approach for evaluating suspected food additive reactions.
Main Methods:
- Literature review of peer-reviewed articles and textbooks.
- Inclusion of blinded, placebo-controlled oral challenges and evaluated case reports.
- Emphasis on evidence-based approaches for diagnosis.
Main Results:
- Numerous symptoms linked to food additives, though causality is not always established.
- Adverse reactions appear rare but may be underreported.
- Limited role for skin or in vitro testing in diagnosis.
Conclusions:
- Suspect food additive reactions in patients with multiple food sensitivities or reactions to commercial vs. homemade foods.
- Investigate food additives for idiopathic reactions.
- Oral challenge testing is definitive; avoidance is key management.