Yes.

Raw cashews have a shell-like structure and grow on the fruit. Raw cashews contain lacinol, the same toxic chemical that can be found in poison ivy, a substance that causes the body to react in the same way as exposure to poison ivy and poison oak. Ingesting large amounts of lacinol can be fatal. While cases of cashew poisoning are relatively rare, the workers who shell them for production are sometimes at risk for side effects due to close contact.

In addition cashews and other nuts, containing a variety of allergens, for people with allergies, may cause the body to varying degrees of allergic reactions, should be eaten with caution. The cashew shell is rich in fat, which is also toxic.

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