research Intradermal Botulinum Toxin A Injection for Scalp Sebum Secretion Regulation: A Multicenter, Randomized, Double-Blinded, Placebo-Controlled, Prospective Study in Chinese Subjects
This study found that one session of intradermal botulinum toxin type A injection decreased scalp sebum secretion and perception of greasiness more effectively than saline for up to 3 months.