The best-studied mechanism of action surrounding red and near-infrared light therapy is the stimulation of mitochondrial energy production in the cells.
Red light therapy improves the efficiency and speed of the electron transport chain within the mitochondria, improving the availability of ATP (cellular energy) in the cells and throughout the body. This increased energy is what is thought to provide the many benefits that red light therapy is used for.
The bottom line is that when your cells have more energy, they do their jobs better!
To learn more read How Does Red Light Therapy Work?