Botox has been used clinically for various purposes since 1989. It is actually a purified version of botulinum toxin, a bacterial substance that can be used to treat humans medicinally. Its main course of action is that it decreases muscle activity by blocking the release of acetylcholine. Given in tiny doses and injected directly into the muscles that are underneath the wrinkle or line, it weakens and relaxes the muscle, giving the skin a smooth surface where it is injected for a period of up to three months' time. Complete article
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