Author: Michael Hunt, MD
Educational Pearls:
Here is a list of some very toxic natural substances:
#5: Tetrodotoxin: Found in pufferfish and other aquatic species
#4: Ricin: made from castor beans
#3: Mercury: natural element absorbable through skin and gloves
#2: Batrachotoxin: found on poison dart frogs
#1: Botulinum toxin: produced by Clostridium botulinum and causes a descending paralysis
Editor's note: batrachotoxin is thought to be accumulated by the beatles and other insects dart frogs eat - those in captivity therefore are not poisonous
References
https://theconversation.com/handle-with-care-the-worlds-five-deadliest-poisons-56089
