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A cashew is technically not a nut but instead a seed that's attached to a "fruit" called a cashew apple. Part of the same family as poison ivy and poison sumac, the cashew plant contains powerful chemical irritants that are often sold for use in industrial paints, lacquers, and even brake linings. When cashews are harvested, workers wearing protective eye masks separate seeds from the poisonous shells, and the cashews are roasted at extremely high temperatures to destroy any potential irritants.
You won't believe what some foods look like before they hit your farmers' market