October 2006 in “대한피부과학회지” Mesotherapy medications may help promote hair growth.
February 2020 in “International Journal of Current Microbiology and Applied Sciences” Canine hair follicle cells show stem cell properties, aiding hair growth.
March 2022 in “Indian Journal of Animal Research” Dog hair follicle stem cells can turn into fat cells.
January 2014 in “Italian journal of anatomy and embryology” Platelet Rich Plasma can help human hair grow in a lab setting.
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March 2023 in “International Journal of Trichology” Platelet-rich plasma didn't increase hair length but may help keep hair follicles alive.