Low-level laser therapy (LLLT) can be quite effective when used properly. The laser comb has been approved by the US Food and Drug Administration for both safety and effectiveness. It is cleared for hair growth and the treatment of hair loss. Like other non-invasive treatments, some patients get better results than others. However, there are patients who seem to be exceptional responders to this therapy. LLLT is a non-chemical, non-invasive option to help people grow fuller, thicker, healthier hair.