Laser removes hair by absorbing the dark pigment producing cells at the bottom of the hair follicle and then converts the light to heat. The heat damages the follicle and destroys the cells so the hair cannot re-grow. Laser is a great option for large areas of the body that have dark, dense hair. It reduces the hair significantly after six to ten treatments, but the area needs to be followed up with electrolysis to remove the remaining hairs and achieve permanency.