A Systematic Review of Laser-Based Treatments for Hair Loss

This systematic review evaluates the efficacy of various laser treatments for hair loss, including low-level laser therapy (LLLT), excimer laser, erbium glass laser, erbium YAG laser, and CO2 laser. The review synthesizes findings from 29 studies, highlighting that LLLT consistently improves hair count and density, with increases ranging from 35% to 120%. Excimer lasers show hair regrowth in 41.5% to 60% of treated patches, while erbium glass, erbium YAG, and CO2 lasers also demonstrate positive outcomes in hair density and shaft thickness. Despite promising results, the review notes the need for larger clinical trials due to small sample sizes in existing studies. Future research should aim to optimize treatment parameters and explore visible light therapy for more targeted and cost-effective hair loss treatments.