What’s the deadliest toxin that occurs naturally?

The bacteria Clostridium botulnum is the deadliest toxin that occurs naturally.

It’s the cause of botulism, the deadly food poisoning that is sometimes contracted from canned goods or meats.

Strangely, it’s also a medication who have involuntary muscle spasms. In very small quantities, botulinal toxin causes local paralysis, easing painful and debilitating muscle contractions.

A low-dose medicine that is used in plastic surgery under the name Botox. Injected into facial muscles, it paralyzes them, reducing the appearance of fine lines and wrinkles.

Some say it also reduces the appearance of emotion or personality.