![]() ![]() They worked with one protein and looked to see what other nut proteins were also affected. In 2005, a team of researchers measured cross-reactivity between tree nuts. And people who can tolerate walnut are more likely to tolerate pecan. People who are allergic to walnut are more likely to be allergic to pecan because they come from the same tree nut family. Here’s a list of some tree nut families and the specific nuts they include: Tree nuts from the same family often cause cross-reactivity between each other. Most often, tree nut allergy starts in toddlers and only about 9% of children outgrows a tree nut allergy - everyone else maintains it for life. Only an allergist can help you understand if cross contamination is a problem. Most tree nuts are processed in facilities that handle many tree nuts, so parents should also consider the risk of cross contamination (tiny bits of unlisted ingredients in packaged foods). Some tree nuts are closely related to each other so children with cashew allergy often have pistachio allergy, and children with walnut allergy often have pecan allergy (read more about Tree Nut families below).Īll children with a tree nut allergy should talk to their doctor to be tested about which specific tree nuts they need to avoid and which foods they can tolerate. Many children with a tree nut allergy are allergic to more than one tree nut. ![]() A person with a tree nut allergy can be allergic to one or more of these tree nuts. A tree nut allergy is an immune system reaction after eating or coming into contact with a tree nut.Īlmonds, walnuts, hazelnuts, cashews, pine nuts, pistachios, pecans, macadamia nuts, and brazil nuts are all tree nuts. Tree nut allergy affects about 1% of the U.S. Tree nut allergy is one of the “top 8” most common food allergies. Let’s walk through what tree nuts are and how tree nut allergies are different. People often confuse peanut allergies with tree nut allergies.
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