Laser hair reduction works by targeting the melanin in the hair follicle, therefore it works best on dark, coarse hair. It does also work on areas with lighter, thinner hair as most people have a combination of colors and textures in any given area. Unfortunately, red, white, grey, and very light blonde hairs have little to no melanin or pigment and do not tend to respond as well. It is best to have a consultation to allow our medical providers to assess the treatment area.