A study published in the Annals of Allergy, Asthma, and Immunology suggests that not everybody who tests positive for tree nut allergies is in fact allergic to all tree nuts.
“Too often, people are told they’re allergic to tree nuts based on a blood or skin prick test,” says allergist Christopher Couch, MD, ACAAI member and lead author of the study. “They take the results at face value and stop eating all tree nuts when they might not actually be allergic. We examined records of 109 people with a known tree nut allergy to an individual nut. They were tested for other tree nuts they had never eaten before using blood or skin prick tests. Despite showing a sensitivity to the additional tree nuts, more than 50 percent of those tested had no reaction in an oral food challenge.”
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