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    Ingredient guide · Ingredient reference

    Hazelnut and peanut are different foods—and separate allergy questions

    Hazelnuts are tree nuts; peanuts are legumes. That botanical distinction does not establish that a person allergic to one can safely eat the other.

    Read the evidence ↓

    Supplement Science Insights Editorial Team

    Published September 23, 2026

    The plant distinction

    Peanuts develop as underground pods after flowering above ground. They are a legume crop, despite nut in the common name. Hazelnut, also called filbert, appears in FDA’s tree-nut allergen list. The two ingredients should not be treated as synonyms when reading a recipe or label. [1][2]

    Allergy is an individual assessment

    FDA lists peanuts and tree nuts separately among major food allergens. A different plant category does not prove tolerance, and a person may need to avoid more than one food. Follow an allergy-specific plan and evaluate the full product, including relevant cross-contact information, rather than testing a suspected allergen at home. [3]

    A spread-label example

    Imagine a spread contains hazelnuts but no listed peanut ingredient. That identifies its recipe; it does not certify suitability for someone with a peanut or tree-nut allergy. Read the current full label and obtain clarification where needed. A substitution that works for flavor can still be unsuitable for the person who will eat it. [3]

    Hypothetical example — interpret the stated distinction, not diagnose or recommend a product
    Hypothetical termMeaning
    PeanutLegume crop
    Hazelnut or filbertTree nut
    Different botanical categoryNot proof of personal allergy safety
    Hazelnut and peanut are different foods—and separate allergy questions — original article outline diagram
    Original editorial diagram of this article’s sections; no product photograph or clinical finding is depicted.

    Sources for this article

    1. Kew — Plant proteins: Can they grow in the UK?
      Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product.
    2. FDA Food Allergen Questions and Answers, Edition5
      Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product.
    3. Food Allergies: What You Need to Know | FDA
      Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product.