Safety and efficacy of Low Level Laser Therapy

A Retrospective Study to Investigate and Evaluate the Unanticipated Results of Hair Loss Cessation and Temporary Hair Regrowth in Adult Males who Had Undergone Low Level Laser Therapy for Hair Wellness

Author: Glen M. Charles, DO


This study was designed to improve cosmetic hair wellness and hair quality in individuals using a low-level laser therapy (LLLT) device. The parameters of measurement are based on hair thickness, density, suppleness, sheen, silkiness and colour treatment retention. All subjected received treatment in a single Hair Solutions center for 16 weeks, under the care of the clinic’s staff. This study is based on a randomized, double blind, multi-center clinical trial. The purpose of the study is to evaluate the available data on the safety and efficacy of a low-level laser device in its possible application as a therapy for treating patients experiencing androgenetic alopecia.


After the 16 weeks study, there were no reported side effects or any headaches, itch, redness, burning or tingling sensation. Significant hair growth was observed in each area where the counts were performed. The areas include frontal, vertex and temporal. The overall average growth for all subjects was 37.79%.

Pilot Study of a Low Level Laser Therapy for the Treatment of Androgenetic Alopecia: Use of the Revage 670 nm Diode Laser Array as a Primary Treatment

Author: Richard A. Burgmeier, MD


This objective of this study was to evaluate the effectiveness of a Low Level Laser Therapy through a non-blinded, single center, prospective format, for use as a primary therapy for the treatment of Androgenetic Alopecia. Treatments were performed on the frontal, temporal and vertex areas of the scalp for a period of 12 weeks. The subjects received 2, 20-minute treatments per week for 6 weeks and 1 treatment per week for 6 weeks.


An overall 39.74% increase in terminal, darkly coloured hairs was achieved with this therapy. Objective analysis of the data reveals the vertex as the area with the greatest increase and the least variance between male and female subjects. These data suggest that the Low Level Laser Therapy device may provide the physician with the first primary therapy for Androgenetic Alopecia that is not pharmacological or surgical. Each subject indicated that his or her hair loss had stopped after the 10th treatment and prior to the 12th treatment, as manifested by a lack of hair in a shower drain or hairbrush.