Low Light Laser Therapy (LLLT) in hair restoration utilizes cool lasers to stimulate hair growth and reduce hair loss. LLLT is based on the scientific principle of photo-biotherapy. Photo-biotherapy occurs when laser light is absorbed by cells and stimulates cell metabolism and protein synthesis. 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.