Unwanted hair on the body can be treated by several methods to achieve near-permanent hair reduction. The most effective method utilizes light and laser based energy to destroy the hair follicle. The light is usually targeted to the pigment contained in the hair follicle. The light energy is absorbed by the hair follicle and the resulting heat damages the hair follicle to impede hair growth. Laser hair removal is only effective for those follicles that are actively growing. Since only a small percentage of your hair follicles are growing at any time, it make take 4-6 sessions to treat all of the follicles. Pigment is needed to attract the light energy, so blonde, gray and red hair are not effectively treated with lasers. Furthermore, since skin pigment also absorbs the energy, tanned and darker skin types are usually contraindicated.