Low-Level Laser Therapy (LLLT) for Androgenetic Alopecia

Introduction

Androgenetic Alopecia (AGA) is the leading cause of hair loss in both men and women. Approximately 50% of men over 50 and 50% of women over 80 experience this condition. Hair thinning not only affects appearance but also impacts the quality of life and self-confidence of many patients.

Although medications such as Finasteride and Minoxidil are widely accepted, they have limitations in terms of side effects and efficacy. This has led to the search for new alternatives. One approach that has garnered attention is Low-Level Laser Therapy (LLLT), which uses low-energy laser light to stimulate hair follicle cells.

Methodology

This research is a systematic review, searching data from Medline, Google Scholar, and Embase from 1960 to 2015. It included 11 studies on LLLT use in AGA patients, with a total of 680 participants (444 men, 236 women).

Results

Efficacy in Increasing Hair Count

9 out of 11 studies reported that LLLT significantly increased hair count and density.
The average increase in hair count was between 15–25 hairs per 1 square centimeter within 16–26 weeks.
The best results were found with devices using a wavelength of approximately 655 nanometers.

Hair Thickness and Strength

2 out of 4 studies found that hair thickness and resistance to pulling improved after continuous LLLT use.
This change was consistent with the improvement of the “Anagen Phase” in hair follicles.

User Satisfaction

Most participants reported that they felt their hair loss slowed down and their hair became stronger and healthier.
Subjective results were often “less prominent than objective measurements,” indicating that reasonable expectations should be set before treatment.

Safety and Side Effects

LLLT is considered highly safe.
Side effects observed included dry skin, itchy scalp, mild warmth, or redness, which were temporary and not severe.

Mechanism of Action

Low-level laser irradiation stimulates hair follicle cells to produce more ATP (cellular energy), increases blood circulation, and stimulates gene expression related to hair growth. The results are:

Stimulating hair follicles to enter the Anagen (growth) phase faster.
Extending the duration of the hair growth phase.
Reducing hair follicle miniaturization, which is the primary mechanism of hereditary hair loss.

Conclusion

Based on academic evidence from 2003–2015, it was found that:

LLLT is a safe, effective treatment approach with good results in both men and women.
FDA-approved devices such as HairMax LaserComb and TOPHAT 655 have the clearest supporting data.
LLLT is suitable for those who do not wish to use medication long-term or are not yet ready for hair transplantation.

ReferencesAfifi, L., Maranda, E. L., & Zito, P. M. (2017). Low-level laser therapy as a treatment for androgenetic alopecia. Lasers in Medical Science, 32(6), 1429–1436.

https://doi.org/10.1007/s10103-017-2235-8