What are neuromodulators and how do they work?

Neuromodulators, like Botox, Dysport, Xeomin and Nuiceva are prescription products that contains a highly purified protein, botulinum neuromodulator.
Very low doses of a purified protein are injected into the small muscles that cause wrinkles. The injections relax the muscles and limit their ability to contract. The effect is a softening of dynamic and static wrinkles.