Cool Lasers: Low-Level Light Laser Therapy for Hair Growth
Low-Level Laser Therapy (LLLT) in hair restoration utilizes cool lasers to stimulate hair growth and reduce shedding of hair. LLLT is based on the scientific principle of photo-biotherapy. Although the exact mechanism by which laser light promotes hair growth is still unknown, it appears to stimulate the follicles on the scalp by increasing energy production and by reversing miniaturization (the process leading to thicker hair shafts and a fuller look).
Laser light is in the visible red light spectrum and is generated in a laser diode. The energy level is far below that of laser beams that cut or burn tissue. The low-level red laser light has a very low absorption rate in human tissue making it safe for use in the treatment of hair loss.
While these cool laser treatments have been approved for use, their long-term effectiveness has yet to be determined. A 12 month program can require treatments from 3x per week tapering to one treatment per month and the results and satisfaction from patients thus far have been sporadic.