For cosmetic purposes, millions of people undergo Botox injections in various parts of their body, but not-so-well known fact about Botox is that it's a neurotoxin that's the most dangerous toxins known to man.
When taken intravenously, intramuscularly, or inhaled, botulinum toxin causes a serious and life-threatening illness called botulism. Affecting both humans and animals, botulism causes weakness, difficulty seeing, fatigue, and trouble speaking, which is then followed by body-wide weakness.
Depending on various variables - such as the the severity of botulism and how early it's caught - death occurs in 5-10% of people who are affected.