Food allergy and atopic dermatitis.

Area of Science:

• Dermatology
• Allergology
• Immunology

Background:

• Atopic dermatitis (AD) is a chronic inflammatory skin condition causing intense itching and lesions.
• AD is associated with increased risk of developing food allergies (FA), particularly in children.
• Skin inflammation in AD can impair the skin barrier, increasing susceptibility to allergens and irritants.

Purpose of the Study:

• To review the relationship between atopic dermatitis and food allergy.
• To discuss the implications of food allergy testing in AD patients.
• To provide guidance on appropriate food allergy evaluation in the context of AD.

Main Methods:

• Literature review of studies investigating the link between AD and FA.
• Analysis of data on the prevalence of FA in AD populations.
• Evaluation of diagnostic approaches for FA in AD patients.

Main Results:

• Children with moderate-to-severe AD have a significantly higher prevalence of immunoglobulin E (IgE)-mediated FA.
• Food challenges can reproduce AD symptoms, and avoidance diets may improve AD.
• Food sensitization in AD does not always equate to clinical allergy, and elimination diets carry risks.

Conclusions:

• While AD and FA are linked, elimination diets are not a cure and can lead to adverse outcomes like nutritional deficiencies and anaphylaxis.
• Food allergy testing in AD patients should be guided by clinical history of immediate allergic reactions.
• Testing is recommended for infants with AD unresponsive to optimal skin care or those with clear allergic symptoms upon food ingestion.