THE USE OF PHOTOTHERAPY WITH DIFFERENT WAVELENGTHS IN THE TREATMENT OF ANDROGENETIC ALOPECIA

Abstract

Phototherapy has emerged as a safe, non-invasive, and promising approach for treating Androgenetic Alopecia (AGA). This study aimed to assess the effects of phototherapy on AGA using two distinct wavelengths: red and blue. A total of 10 volunteers diagnoed with AGA were selected and approved by the ethics committee (opinion no. 5.761,579). The participants were divided into two groups: GLV (n=5) treated with red light (A=660nm, 43) and GLA (n=5) treated with blue light (A=440 nm. 4J). Treatments were administered using Venus equipment (MMOptics, São Carlos, Brazil) and conducted once a week over a period of 90 days, resulting in a total of 12 sessions. Hair growth progress was monitored through photographic records and the analysis of vellus and terminal hair ratios using digital trichoscopy imaging (Dino Lite: New Taipei City. Taiwan, China).The study findings indicated that both red and blue light, under the parameters tested, contributed to an increase in hair density, a reduction in the width of the central parting. and an increase in the number of terminal hairs post-treatment. Additionally, there was a noticeable reduction in vellus hairs. These results underscore the potential of phototherapy as an effective treatment modality for AGA.