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More Americans claim to have food allergies than ever before, but a report published in 2016 from the National Academy of Sciences says that it’s hard to know how many people in the U.S. actually have food allergies. Although many healthcare professionals involved in patient care agree that an increase has occurred, specifying its actual extent is complicated by factors such as inconsistent data or studies that use variable methods.

For decades parents have been told to delay feeding their children certain foods they could be allergic to, including peanuts, eggs, wheat, and milk. But recent studies suggest exposing at-risk children to potential allergens as infants might actually prevent them from developing an allergy.
Source: Genetic Literacy Project