A Retrospective Study Supporting the Importance of Individualizing the Dose of Botulinum Toxin According to the Age.

Background: Botulinum toxin type A injection remains the leading nonsurgical cosmetic procedure worldwide with a high rate of efficacy and patient satisfaction.

Objective: This study aims to demonstrate the importance of individualization of botulinum toxin doses to treat the upper face according to the age of the patients, considering the muscles particularities and the specificities of each face area.

Materials And Methods: A retrospective study with 389 female patients treated with botulinum toxin type A in the upper third of the face (forehead, glabellar, and periorbital lines).