Botulinum toxin-A may increase hair growth and reduce hair loss in men with baldness, and injecting near blood vessels can improve pain relief and last longer.
This study found that Botox® was most effective at a 25 U/ml concentration, while Dysport® and Neurobloc® were optimal at 100 U/ml for producing anhidrotic areas after injections.
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January 2016 in “Skin appendage disorders” This study reports that women receiving periodic injections of botulinum toxin type A for forehead wrinkles may experience frontal alopecia, with progressive hairline recession observed in the cases studied.
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July 2005 in “Optometry and vision science” This case report documents unilateral madarosis and facial alopecia as potential adverse effects of botulinum A toxin injections in a patient treated for left oromandibular dystonia.
May 2018 in “Journal of Sun Yat-sen University” This study found that local injections of botulinum toxin A improved hair density in male patients with androgenetic alopecia over a 6-month period, showing similar effectiveness to the control group.