Treatment Effect
Single Session Effect
Generally, one session of wrinkle-relaxing injections lasts 6–12 months. Botulinum toxin injections can maintain results for 4–6 months; hyaluronic acid injections typically last 6–8 months, while collagen injections last approximately 6–12 months. For facial rejuvenation with added hyaluronic acid, duration varies by brand and molecular weight; for example, Restylane-2 hyaluronic acid typically lasts around 9 months.
Multiple Sessions
Multiple injections can sustain a youthful appearance as effects wear off, but botulinum toxin should not be administered frequently within three months. Overuse may trigger antibody formation, so injections must follow medical guidance.
