Meta-analysis: Botulinum Toxin Type A Improves Patient-Reported Aesthetic Outcomes
Key Takeaways
A systematic review of 65 placebo-controlled randomized clinical trials involving 18,581 participants found that botulinum toxin type A (BoNT-A) consistently improved patient-reported aesthetic outcomes.
Four pooled responder analyses favored BoNT-A over placebo, with risk ratios ranging from 5.53 to 14.74.
Evidence supporting aesthetic satisfaction and perceived improvement was moderately certain, while findings related to psychological well-being, self-esteem, and quality of life were less conclusive.
A systematic review and meta-analysis published in Aesthetic Surgery Journal showed that botulinum toxin type A (BoNT-A) improved patient-reported aesthetic outcomes when compared to placebo, as well as treatment satisfaction, facial-line appearance, and perceived age.
The analysis included 65 placebo-controlled randomized clinical trials (RCTs) encompassing more than 18,000 participants from all randomized treatment groups. Researchers evaluated whether BoNT-A improved aesthetic self-perception and related patient-reported outcomes compared with placebo, vehicle, or saline injections.
Patient Satisfaction and Facial Appearance Outcomes
Investigators searched five databases through September 25, 2026 and identified 75 reports, 70 of which provided direct comparative evidence,. Five reports contributed contextual information. Four clinically homogeneous responder subsets were included in quantitative meta-analyses.
According to the authors, all favored BoNT-A, which improved patient-reported treatment satisfaction, facial-line severity or bother, perceived youthfulness, and selected appearance-related psychosocial outcomes. Risk-of-bias assessments classified 39 trials (60%) as low risk and 26 (40%) as having some concerns.
The researchers rated evidence certainty as moderate for satisfaction, global aesthetic improvement, facial-line appearance, and perceived age or naturalness. They reported low for appearance-related psychological well-being and very low for general quality-of-life and self-esteem outcomes. The authors also noted that evidence supporting broader psychological benefits remained less certain.
"Placebo-controlled evidence supports a consistent patient-perceived aesthetic benefit of BoNT-A, while broader psychological and quality-of-life claims remain less certain," the authors concluded.
Source
Fernandois Barrera VAJ, et al. Aesthet Surgery Jourunal. October 19, 2026. Doi:10.1093/asj/sjag236