#8: Lethal
When it comes to vitamins, we human beings are constantly lacking in or producing too much of a certain vitamin. Many health professionals say that if we were to make small changes in our vitamin intake, we could potentially feel a significant difference in our everyday lives.

But have you ever thought about the number of vitamins some animals produce? We humans can be so self-centered in the way that we don’t think about how other animals function. And apparently, the average polar bear’s liver contains enough vitamin A to kill 52 adults. Who knew vitamin A could be so lethal…