Answer:
The continuous use in aesthetics and other medical procedures of botulinum toxin is known, however there is no scientific evidence to support the doses necessary to kill a cell in humans, it is known that this toxin is measured in units of mouse oMU, referring a unit of notulin toxin is equivalent to 0.05 nanograms, with a lethal dose in mice of 0.00000033 mg and for humans from 1 to 2 µg.
It is known that in terms of its mechanism of action, it occurs by blocking the acetylcholine output of the presynaptic neuron, which generates muscle paralysis, making it possible to recover after approximately 3 months.