The physical substance of Botox is derived from a neurotoxin botulinum toxin- a type of bacteria. The bacteria itself is highly toxic, but in small doses, it works well for cosmetic purposes to reduce wrinkles and fine lines, and assists in other non-cosmetic purposes like excessive sweating and migraines.
The effectiveness of Botox and its popularity is attributed to its ability to block nerve signals, and temporarily relax the muscles in the targeted area. Botox Injections directly target the chemical messenger Acetylcholine. Acetylcholine is a neurotransmitter that transfers instructions for the muscles to relax and tense by transferring such instruction at the junction of synapses that meet muscles cells. Botox injections prevent acetylcholine from being released at the junction, and as a result, it paralyses stiff muscles that cause the presence of wrinkles.