Botox wrinkle therapy contains a tiny dose of a deadly bacterial toxin originally found in spoiled sausages. Learn the history of botulinum toxin, plus how it's used in non-cosmetic medicine, in this classic episode of BrainStuff, based on this article: https://health.howstuffworks.com/human-body/systems/digestive/rotten-sausages-botox-botulism.htm