How it works
How Botox Actually Works on Facial Muscles
Botox is a purified protein derived from Clostridium botulinum. In small, precise cosmetic doses, it temporarily interrupts the acetylcholine signal at the neuromuscular junction — the point where the nerve tells the muscle to contract. When that signal is muted, the muscle relaxes, and the overlying skin has a chance to smooth.
Because Botox is a neuromodulator (not a filler), it does not add volume. It relaxes movement. That means dynamic lines — the ones that appear when you frown, squint, or raise your brows — respond best. Deep static lines that are already etched into the skin at rest may soften over time with consistent treatment, but they typically respond even better when Botox is paired with skincare, microneedling, or filler when appropriate.
Dosing is measured in units, and the number of units you need depends on your muscle strength, gender, treatment area, and desired outcome. A first-time forehead treatment might use very different dosing than a maintenance frown-line touch-up. Joanna will walk through recommended units at your consultation.

