This publication looked at review of articles using light therapy for hair loss. They concluded that this therapy appeared to be both safe and effective for hair loss in men and women. One study in mice showed that light therapy stimulated hair growth in mice subjected to chemotherapy-induced hair loss. As they went through the actual mechanisms, the main one that is hypothesized is to be “stimulation of epidermal stem cells in the hair follicle bulge and shifting the follicles into anagen phase” <view study>