nut seed is a kidney-shaped snack surrounded by several toxic layers intended to keep animals from gobbling it up. Outside the seed is a double shell filled with anacardic acid, which causes a skin rash on contact. In order to make the cashew seed edible, it's typically roasted to neutralize the acid — but roasters urge caution, because the smoke that comes off the acid is itself toxic. _
File this under Seems Like a Hoax, But Isn’t.