The American Academy of Allergy, Asthma & Immunology is urging parents to introduce potential allergens, including eggs and peanut butter, to children when they are as young as 4 months old. "There's been more studies that find that if you introduce them early, it may actually prevent food allergy," said David Fleischer, co-author of the article in The Journal of Allergy and Clinical Immunology: In Practice.

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