The current recommendations from the American Academy of Pediatrics and the Centers for Disease Control and Prevention call for introducing to infants one single-ingredient food at a time and waiting three to five days to observe for food allergy before introducing another new food. However, the long waiting period might be too long, given that food allergy becomes apparent within minutes to a few hours after eating a new food. A recent survey of pediatricians, published in JAMA Network Open, found significant variability in their recommendations to parents about solid food introduction, which calls into question the relevance of the current guidelines. The study authors suggest that these guidelines are out of synch with the latest approaches to food allergy prevention, and that the long waiting period might even be harmful.
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