From the Research
Red light therapy is a viable treatment option for hair loss, particularly for androgenetic alopecia, as it has been shown to stimulate hair growth, increase hair density, and improve hair thickness, with minimal side effects, as demonstrated in the most recent and highest quality study 1.
Key Findings
- Red light therapy, specifically at wavelengths between 630-670 nm, has been found to promote hair growth in both men and women with androgenetic alopecia.
- The therapy works by stimulating hair follicles, increasing blood flow to the scalp, and reducing inflammation.
- Studies have shown that red light therapy can increase hair count, hair density, and hair thickness, with some studies demonstrating a 35-39% increase in hair growth.
- The treatment is generally safe, with minimal side effects, and can be used in combination with other treatments like minoxidil or finasteride for enhanced results.
Treatment Guidelines
- For best results, treatments should be consistent, typically 2-3 times weekly for 15-30 minutes per session.
- Commercial devices, including laser combs, helmets, or panels, can be used for treatment.
- Most users need at least 3-6 months of regular treatment to see noticeable improvements.
Evidence Summary
- A 2024 study published in Photodermatology, photoimmunology & photomedicine found that red LED light therapy resulted in a statistically significant decrease in vellus hair density and achieved a greater increase in hair diameter compared to green LED therapy 1.
- Another study published in 2021 in the Journal of cutaneous and aesthetic surgery found that low-level laser therapy (LLLT) stimulated hair growth in both men and women with androgenetic alopecia, with some studies showing increased hair count and thickness after regular use 2.
- A 2017 meta-analysis published in the Journal of the American Academy of Dermatology found that low-level laser light therapy, minoxidil, and finasteride were all effective for promoting hair growth in men with androgenetic alopecia, with minoxidil also being effective in women 3.