Low-Level Laser Therapy: Does Red Light Really Work?
Examine the science behind red light therapy and its impact on follicle metabolism and scalp circulation.
Low-Level Laser Therapy (LLLT) has been marketed for years as a solution for thinning hair, but how does it actually work? A 2024 review in Lasers in Medical Science examined over 30 clinical trials using wavelengths between 630–670 nm.
- LLLT increased blood flow and ATP synthesis in follicle cells.
- Participants showed 15–20% increases in hair density after 24 weeks.
- Optimal use required 15-minute sessions, 3–4 times weekly.
- Combining LLLT with Minoxidil doubled efficacy in some cases.
LLLT is one of the few evidence-based, non-drug therapies that promote regrowth through bio-stimulation rather than chemical action. Understanding its mechanisms allows for safer, more standardized protocols.
Results varied significantly based on the device and duration of use.
Citation & Review Team
Full Citation
Moretti P. et al., Lasers Med Sci, 2024.Review Team
Author: Student Editor
Fact-Checker: Dermatology Researcher
Disclaimer
This article is for educational purposes only and not a substitute for professional medical advice.