Botulinum toxin is produced by the bacterium Clostridium botulinum and it is, beyond a doubt, the deadliest known protein. If the clostridium botulinum spores find their way to food or wounds, they will begin to release the toxin which leads to poisoning if eaten. It is so deadly that a mere two pounds (roughly 1kg) of the stuff is enough to kill the entire human population. It is so deadly that it is potentially useful as a biological weapon. This is the kind of thing we obviously want to keep right away from right? Well, no. Millions of people have this deadly protein injected into their face every year; it is present in minute quantities in Botox which is used to “treat” wrinkles.