Tree nut allergy — what it covers, and how to host someone with one
In one paragraph
Tree nut allergy covers almonds, walnuts, pecans, cashews, pistachios, hazelnuts, Brazil nuts, macadamias, and more. It's distinct from peanut allergy (peanuts are legumes), though many people have both. Tree nut reactions can be severe and sometimes anaphylactic, so cross-contact matters — nuts hide in pesto, granola, baked goods, and some Asian sauces.
Why it matters
Tree nut allergy is one of the most common severe food allergies, and the list of ingredients that contain tree nuts is longer than most hosts realize. The careful host treats 'nuts' as a category until the guest specifies which ones. A person allergic to cashews may be fine with almonds, or may react to all tree nuts — their answer determines your shopping list.
For the guest: script
'I'm allergic to [specific tree nuts — e.g., cashews and pistachios, or 'all tree nuts']. Peanuts are [also an issue / fine]. Cross-contact matters, especially in baked goods and desserts. I carry epinephrine. If there's a dessert I can't eat, a bowl of fruit is a perfect substitute.'
For the host or business
Ask which nuts specifically, and whether peanuts are also off-limits. Skip pesto (usually pine nut or walnut), granola (often almonds), and store-bought baked goods (often cross-contact in the bakery). Almond milk in the coffee is a sneaky hit; have oat milk as a backup. Deep-clean cutting boards if you've chopped nuts today.
Frequently asked questions
- Are coconuts tree nuts?
- Botanically, a coconut is a drupe, not a nut. The FDA lists coconut as a tree nut for labeling purposes, but most tree-nut-allergic people can tolerate coconut. Always ask your guest — some are sensitive, most aren't.
- Is almond milk safe for someone with a tree nut allergy?
- No, if they're allergic to almonds. Almond milk is made from almonds. Oat milk, rice milk, or soy milk are typical substitutes. Check the label — some 'plant milk' blends sneak in cashew or macadamia.
- What foods commonly contain tree nuts?
- Pesto, granola, trail mix, many baked goods, pralines, marzipan, some Asian sauces and curries (especially with cashew paste), and a lot of ice cream flavors. Restaurants should always be asked directly rather than assumed safe.
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