April 2026 in “Frontiers in Medicine” This study observed that 675-nm diode laser therapy may serve as a safe and possibly effective adjuvant treatment for telogen effluvium, showing improvements in hair pull test results, pruritus, and trichodynia among patients. However, controlled studies are needed to confirm its efficacy.
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June 2024 in “JMIR Dermatology” This study found that 675 nm laser treatment improved androgenetic alopecia in Indian patients, resulting in significant increases in hair count, density, and thickness after 14 sessions, enhancing the anagen phase and other hair-related parameters.
In this study, 14 sessions of 675 nm laser stimulation significantly improved hair count, density, and thickness in Indian patients with androgenetic alopecia, with an increase of around 17% in hair parameters over four months.
October 2023 in “Skin research and technology” This study evaluated the effectiveness of a 675 nm laser device on facial acne scars in patients with darker skin types, finding that 67% reported excellent improvement and 33% reported good improvement, with significant enhancements in skin texture and appearance after five treatments.
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November 2025 in “Healthcare” This study found that among young patients with acne vulgaris, combining a 675 nm red-light laser with isotretinoin led to more rapid and pronounced improvement in lesion severity compared to laser treatment alone, without adverse events.
