On January 2007, the US Food & Drug Administration (FDA) approved the use of Photo-Therapy Low Level Laser technology to stimulate and promote hair regrowth. Laser Photo-Therapy hair treatment or “ Low Level Laser Therapy” (LLLT), administered to the scalp has been show to improve the health of existing hair and stimulate new hair growth; LLLT may also be used to aid healing of the scalp after hair transplant surgery.