Botulinum toxin is a protein and neurotoxin produced by the bacterium Clostridium botulinum. Botulinum toxin can cause botulism, a serious and life-threatening illness in humans and animals. When introduced intravenously in monkeys, type A (Botox Cosmetic) of the toxin exhibits an LD50 of 40–56 ng, type C1 around 32 ng, type D 3200 ng, and type E 88 ng; these are some of the most potent neurotoxins known. Popularly known by one of its trade names, Botox, it is used for various cosmetic and medical procedures. Botulinum toxin can be absorbed from eyes, mucous membranes, respiratory tract or non-intact skin.
Read more about Botulinum Toxin: History, Therapeutic Research, Denaturing, Sources, Chemical Overview and Lethality, Medical and Cosmetic Uses, Biochemical Mechanism of Toxicity, Treatment of Botulinum Poisoning, Manufacturers