On average, people get about 7 units of Botox between their eyebrows and about 4 units in the forehead line above the nose, and men and women get roughly the same amount.
Scientific Claim
The average dose of botulinum toxin type A (BoNT-A) used in the corrugator muscle is approximately 7.2 units, and in the procerus muscle is approximately 3.9 units, with minimal difference between men and women.
Original Statement
“The mean total units of BoNT-A used were 7.2U in the corrugator muscle (7.1U in women and 7.4U in men) and 3.9U in the procerus muscle (3.9U in women and 4.1U in men).”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The claim reports observed means from a cross-sectional sample — no causal language is used. The verb 'is' is acceptable for descriptive statistics in observational studies.
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.
Systematic Review & Meta-AnalysisLevel 1aThe pooled average BoNT-A dose required for corrugator and procerus muscles across diverse populations and clinical settings.
The pooled average BoNT-A dose required for corrugator and procerus muscles across diverse populations and clinical settings.
What This Would Prove
The pooled average BoNT-A dose required for corrugator and procerus muscles across diverse populations and clinical settings.
Ideal Study Design
A meta-analysis of 20+ RCTs and prospective studies (n>5,000 total patients) reporting BoNT-A doses for glabellar lines, stratified by muscle, sex, age, and wrinkle severity, using standardized measurement protocols.
Limitation: Cannot account for clinician variability in dosing practices across studies.
Prospective Cohort StudyLevel 2bWhether these average doses remain stable over time and across different practitioner styles.
Whether these average doses remain stable over time and across different practitioner styles.
What This Would Prove
Whether these average doses remain stable over time and across different practitioner styles.
Ideal Study Design
A multicenter prospective cohort of 500 patients treated by 50+ certified providers, recording exact BoNT-A doses per muscle, with follow-up at 3, 6, and 12 months to assess consistency.
Limitation: May be confounded by regional practice patterns or insurance reimbursement policies.
Cross-Sectional StudyLevel 4In EvidenceThe current distribution of BoNT-A doses in a real-world clinical population.
The current distribution of BoNT-A doses in a real-world clinical population.
What This Would Prove
The current distribution of BoNT-A doses in a real-world clinical population.
Ideal Study Design
A nationwide survey of 1,000 cosmetic practitioners recording the most recent BoNT-A dose administered to a typical patient for corrugator and procerus muscles, with demographic data.
Limitation: Relies on practitioner recall and may not reflect actual administered doses.
Evidence from Studies
Supporting (1)
The study found that doctors typically use about 7.2 units in the frown muscle and 3.9 units in the forehead muscle between men and women, just like the claim says—so the claim is right.