Lasers work by selectively destroying the hair follicle. When properly administered, lasers target the pigment in hair follicles but leave the skin unharmed.
Hair growth is affected by many factors: hormones, medication, age, hereditary issues, skin color and even the weather. No two people have the same response to a laser treatment and the treatments need to be individualized. Generally, you can obtain an 80% or greater clearance level. Touch up treatments may be needed in the coming years especially if you start at a young age.