19 citations
,
February 2018 in “Lasers in Medical Science” This study found that 655-nm red light with LED enhanced hair shaft elongation and reduced catagen transition in human hair follicles in vitro by activating the Wnt/ß-catenin signaling pathway.
2 citations
,
January 2007 in “Journal of The American Academy of Dermatology” Red and infrared light therapy improves hair growth in balding patients.
117 citations
,
September 2013 in “Lasers in Surgery and Medicine” This study found that low level laser therapy at 655 nm significantly increased hair counts in males with androgenetic alopecia.
81 citations
,
August 2014 in “Lasers in Surgery and Medicine” This study found that low-level laser therapy significantly increased hair growth in women with androgenic alopecia, achieving a 37% greater increase in hair counts compared to placebo.
January 2026 in “Journal of Hard Tissue Biology” This study found that red LED photobiomodulation significantly enhanced both the metabolic activity and proliferation of human placenta-derived pericytes, alongside increased expression of angiogenic markers, suggesting a potential non-invasive approach to aid tissue repair and vascular regeneration.
