Long-Term Efficacy and Safety of Low-Level Laser Therapy for Androgenetic Alopecia: A 12-Month Prospective Trial

January 2026 in “ Dermatologic Therapy ”

Jong Min Shin, Kyungho Paik, Jung-Im Na, Lew Bark-Lynn, Chang-Hun Huh

low-level laser therapy androgenetic alopecia hair density hair thickness LLLT AGA

TLDR Low-level laser therapy is a safe and effective long-term treatment for hair loss, improving hair density and thickness.

The study assessed the long-term efficacy and safety of low-level laser therapy (LLLT) for androgenetic alopecia (AGA) over 48 weeks with 68 participants, of which 64 completed the study. The LLLT device, used three times weekly, resulted in significant improvements in hair density (25.6% increase) and thickness (15.98% increase), with benefits observed in both men and women across different severities of AGA. The treatment was well-tolerated, with no serious adverse events, and high patient satisfaction, with 85% willing to continue using the device. The study supports LLLT as a safe and effective long-term treatment for AGA, suggesting its potential integration into routine clinical management.

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