Tree nut allergy is one of the eight most common food allergies, affecting roughly 0.5 to 1% of the U.S. population. Tree nuts grow on trees, whereas peanuts grow underground and are considered legumes. Tree nuts include almonds, Brazil nuts, cashews, hazelnuts, pecans, pistachios and walnuts.

What nuts are included in tree nut allergy?

The six tree nut allergies most commonly reported by children and adults are allergies to walnut, almond, hazelnut, pecan, cashew and pistachio. Approximately 50% of children that are allergic to one tree nut are allergic to another tree nut.

Is Avocado a tree nut?

Since avocado is classified as a fruit and not a tree nut, you should be able to eat avocados even if you have a nut allergy. However, some studies have shown that avocados have similar proteins as chestnuts. So if you're allergic to chestnuts, you may have to avoid avocados.