The prevention principle
An expression line is dynamic before it is static. A frown crease appears when you frown; for years it disappears when you stop. Then one day it doesn't. The fold has been repeated so many thousand times that the dermis has remembered the shape. That is the moment correction becomes the only option.
Anti-ageing injections work earlier in that timeline. By softening — not freezing — the muscle's repeated contraction, the dermis is given time to recover between expressions. The line never gets the chance to etch. This is what the literature calls prejuvenation, and it is the most evidence-based use of botulinum toxin in younger patients.
We are not in a hurry to start anyone. The first appointment is a conversation about whether your face is ready, not a sale.
How prevention differs from correction
Lower doses
Half to two-thirds of a corrective dose. Movement is preserved; the muscle is asked to relax, not switch off.
Fewer points
Only the muscles whose patterns are setting earliest — usually the glabella and lateral frontalis. Nothing prophylactic that doesn't earn its place.
Longer intervals
Once the muscle re-trains, four to six months between visits is normal. Maintenance, not dependency.