From the Research
Low-level laser therapy (LLLT) with a wavelength of 655 nm has been shown to be effective in promoting scalp hair growth, particularly when used in combination with 2% minoxidil. This is based on a recent study published in 2024, which found that the combination of 655 nm LLLT and 2% minoxidil resulted in a significant increase in mean hair diameter compared to 2% minoxidil alone 1.
Key Findings
- The study used a randomized, parallel, controlled, single-blind clinical trial design to evaluate the effectiveness of 655 nm LLLT in combination with 2% minoxidil for female pattern hair loss (FPHL) 1.
- The results showed that the combination group had a statistically significant increase in mean hair diameter compared to the 2% minoxidil group 1.
- Another study published in 2021 found that LLLT with a wavelength of 650 nm was effective in downregulating scalp inflammatory biomarkers and boosting the hair regrowth activity of minoxidil 2% 2.
- A study published in 2021 also found that combination therapy of LLLT and 5% minoxidil was more effective than LLLT or minoxidil alone in improving hair density and diameter in female pattern hair loss patients 3.
Treatment Recommendations
- For optimal results, use devices specifically designed for hair growth that emit light in the 630-670 nm range, with treatment sessions typically lasting 10-20 minutes, 3-4 times per week for at least 3-6 months.
- Consider combining LLLT with other treatments like minoxidil or finasteride, but consult with a dermatologist before beginning any combination treatment.
- Consistency is key for seeing noticeable improvements in hair density and thickness.
Safety and Efficacy
- LLLT is generally safe with minimal side effects, but it is essential to follow the recommended treatment protocol and consult with a dermatologist before starting treatment.
- The therapy is most effective for androgenetic alopecia (pattern hair loss) and works best when started early in the hair loss process.