Botulinum toxin is a naturally occurring protein produced by the bacterium Clostridium botulinum. This bacterium makes several different types of protein which are called type A to type F. These varying proteins cause muscles to relax at different levels.
There are currently two different types of botulinum toxin commercially available in the United Kingdom – type A toxin (including the brands Botox, Vistabel, Dysport , Azzalure and Xeomin and Bocouture) and type B toxin (Neurobloc).