Tree nut allergy is in its own category in the top 8 most common food allergens It is not grouped together with peanut allergy as you might think. This is because tree nuts and peanuts grow differently and have different proteins that cause allergic reactions. Because of this, many people with a tree nut allergy can tolerate peanuts and vice versa. Also, it is possible to only be allergic to one type of tree nut, such as walnuts, and be able to tolerate other tree nuts, like almonds, just fine.
What makes managing peanut and tree nut allergies tricky? Well, a couple of things. First, peanuts and tree nuts are often produced and packaged in the same facilities on the same production lines. This means that the risk for cross-contamination is high. Second, peanut and tree nut allergies are usually not mild and often cause serious reactions. This is why many allergists advise people with peanut or tree nut allergies, especially kids, to avoid them all.
List of Tree Nuts
The following chart is from the US Food and Drug Administration Center for Food Safety and Applied Nutrition. It includes all tree nuts that are required to be listed on food labels.
Common or usual name
Prunus dulcis (Rosaceae)
Bertholletia excelsa (Lecythidaceae)
Juglans cinerea (Juglandaceae)
Chestnut (Chinese, American, European, Seguin
Castanea spp. (Fagaceae)
Ingredients Containing Tree Nuts
Following is a list of tree nuts and some ingredients that contain tree nuts: