May 2024 in “Brazilian Journal of Hair Health” In this study, both red and blue light phototherapy were found to increase hair density, reduce the central parting, and boost the number of terminal hairs in individuals with Androgenetic Alopecia, over 12 weeks of treatment.
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April 2022 in “Dermatologic Surgery” This systematic review found that photobiomodulation therapies using ultraviolet and infrared light effectively treated alopecia areata, while red and infrared light treatments were effective for androgenetic alopecia.
November 2025 in “Revista Multidisciplinar do Nordeste Mineiro” This study's review of existing literature suggests potential benefits of red LED photobiomodulation for treating telogen effluvium, but highlights a lack of standardized parameters and calls for further controlled trials.
June 2023 in “RECIMA21 - Revista Científica Multidisciplinar - ISSN 2675-6218” This study reviewed literature on phototherapy for hair loss, finding that both high and low-power phototherapy can promote hair growth, but choosing the appropriate power level is essential for effective results.
January 2026 in “American Journal of Medical and Clinical Research & Reviews” The study discusses using red light therapy for hair regrowth, noting red light alone may aid non-inflammatory hair loss, while infrared-red light combination is necessary for conditions like alopecia areata.