Photobiomodulation (PBM) is a light-based therapy that uses specific wavelengths to interact with body tissues, influencing cellular activity without heat and supporting recovery across both medical and general wellness settings Europe recently released its first formal clinical guide for PBM in oncology, marking a shift toward standardized use of light-based supportive care across cancer treatment centers Clinical research shows PBM is most strongly supported for managing oral mucositis and radiation-related skin damage, two common cancer complications that can interfere with eating, speaking, and treatment continuity Beyond cancer care, PBM has been studied for wound healing, nerve pain, musculoskeletal recovery, skin health, and hair loss, with consensus reviews supporting its safety when properly applied Effective PBM depends on correct wavelength selection, dosing, and device quality, with red and near-infrared light delivering biologically active energy when used within established therapeutic ranges