Botulinum toxin (BoNT) is a neurotoxic protein produced by the bacterium Clostridium botulinum and related species. It prevents the release of the neurotransmitter acetylcholine from axon endings at the neuromuscular junction, thus causing flaccid paralysis.
A combination of factors can cause facial lines. It’s not just about the cellular changes that may occur, or reduction of collagen, or damage caused by free radicals from the sun and the environment.
Repeated muscle contractions from frowning, squinting, or raising eyebrows cause skin to furrow and fold, gradually resulting in the formation of facial lines. Botulinum toxin works beneath the surface and temporarily reduces the underlying muscle activity that causes moderate to severe frown lines, crow’s feet and forehead lines in adults – to help them look visibly smoother.