The dosage of Botox or Dysport units varies among patients due to several factors:Muscle Mass Differences: Men generally have larger muscle mass, which may require higher doses of Botox or Dysport for optimal results.Facial Expression Variances: Individual differences in facial expressions influence dosage requirements; some individuals have less expressive faces, while others are more animated.Facial Muscle Recruitment: After Botulinum Toxin administration, some individuals may recruit additional facial muscles, affecting the required dosage.Biochemical Variations: Patients with specific biochemical differences, such as those taking fat burners, may metabolise Botulinum Toxin differently, impacting the duration of treatment effects.Skin Condition: Sun-damaged skin can alter the efficacy of Botulinum Toxin, necessitating adjustments in the unit dosage.At Skin Renewal, all new patients must schedule a follow-up appointment with the doctor two weeks after the initial injection to evaluate the outcome. Additional injections may be necessary to achieve optimal results, with charges applied for top-ups exceeding 2 to 4 units.