The laser works by targeting melanin, the pigment in our hair follicles. The light is focused on the follicle of the growing hairs, which is heated and destroyed. This is done without harming the epidermis, the top and superficial layer of the skin. The pigments in light and dark skin are best treated by two different wavelengths of light. However, light hair, such as red and blond, have very little pigment and will not get the best treatment results. The hairs that are actively growing are best targeted, which is why it is necessary to have multiple treatments spaced at least 6 weeks apart.