Treatment with LEDs at a Wavelength of 642 nm Enhances Skin Tumor Proliferation in a Mouse Model
This 2021 study investigated the effects of 642 nm red light-emitting diode (LED) treatment on skin tumor development in a DMBA/TPA-induced mouse model. Mice exposed to 642 nm LED light twice weekly for 20 weeks exhibited increased tumor size, greater epidermal thickness, and elevated levels of proinflammatory cytokines (TNF-α, IL-6,