The Evolution of Photobiomodulation for the Treatment of Hair Loss

Photobiomodulation as a therapy for hair loss is one of the more recent additions to our therapeutic armamentarium, although light based therapy in some forms dates back to ancient times. This chapter reviews the evolution of light based therapy and devices and gives the reader a perspective on its role in treating hair loss. The evolution from large, expensive office-based devices to the current wide selection of wearable and hand held devices for home use demonstrates the increased acceptance of this form of treatment which has followed published research demonstrating efficacy.