Walnut oil & beeswax finish, particularly when cured (hardened), is generally considered low-risk for nut allergy sufferers. While raw or unrefined oil might contain trace proteins, the polymerization process reduces the risk of allergic reactions. However, individuals with severe allergies should avoid it, as reactions to food-contact surfaces are still possible. Risk Level: Once walnut oil cures and hardens on wood, the proteins responsible for allergic reactions become inactive.