These common foods can be so dangerous, they can kill you

Cashew nuts

Firstly, these are seeds, not nuts, so you’ve been misled all this time. Their shells are deadly, and have a coating of anacardic acid, which can burn your skin if handled incorrectly, as well as give you a nastily upset stomach. Additionally, cashews must be cooked or steamed before consumption, as in their raw state they contain urushiol, a chemical which is also found in poison ivy, and can be fatal if consumed in large enough amounts. So if you see cashews growing in the wild on your travels, don’t pick or eat them.