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

Cassava

Cassava is popular in South America, and is a delicious root vegetable when prepared correctly. If eaten raw or not prepared right, cassava can turn into hydrogen cyanide!There are two varieties of cassava, the sweet and bitter, and the bitter is 50 times deadlier than the sweet. However, even the sweet variety can kill an adult cow on the spot if not prepared correctly.