TLDR Botulinum Toxin can improve hair growth in androgenetic alopecia, but more research is needed.
This meta-analysis evaluated 7 studies with 232 participants and found that Botulinum Toxin (BTX) significantly increased hair density and diameter in patients with androgenetic alopecia (AGA). The optimal injection dose was 100 U, with reinjections every 6 months showing significant improvements, particularly in male participants. Despite high-quality evidence and consistent results, limitations included small sample sizes and high heterogeneity. The study suggests BTX as a promising treatment for AGA, but emphasizes the need for large-scale randomized controlled trials to establish standardized treatment protocols.
January 2025 in “Dermatologic Surgery” Botulinum toxin injections can safely increase hair count in androgenetic alopecia.
June 2024 in “Dermatology and therapy” Intramuscular injections improved hair density more than intradermal injections for treating hair loss.
June 2024 in “Skin Research and Technology” Botulinum toxin treatment improves hair follicle width and length in androgenetic alopecia.
October 2023 in “The Cochrane library” The medicine baricitinib was found to notably improve hair regrowth in alopecia areata, but more research is needed on its side effects and other treatments.
September 2023 in “JPRAS Open” Botulinum Toxin A may help with hair growth and has some side effects; more research is needed.
August 2023 in “Aesthetic Plastic Surgery” Platelet-rich plasma therapy helps increase hair density in male patients with hair loss but doesn't change hair thickness.
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February 2022 in “JAMA Dermatology” Dutasteride is the most effective hair loss treatment after 24 weeks, but finasteride leads to the most hair growth after 48 weeks.
