Cold or low-level laser therapy is an advanced and effective method to treat hair loss. In this method, non-invasive infrared light is introduced to the scalp that stimulates hair growth. Because there is no heat involved in this procedure, the laser therapy of this kind is termed low-level laser or cold laser therapy. Clinical trials have proved that this method is highly effective and produces sufficient results. Moreover, this method is simple and can be performed to any people suffering hair loss.