https://factmyth.com/factoids/botulinum-toxin-botox-is-the-most-lethal-natural-toxin-known/

Botulinum Toxin (AKA “Botox”) is the most lethal natural toxin known to human kind, that fact helps explain its paralytic effect.

https://factmyth.com/factoids/botulinum-toxin-botox-is-the-most-lethal-natural-toxin-known/