Cold Laser uses laser light energy to stimulate cells to function optimally. Cold laser therapy is similar to photosynthesis in plants; sunlight is absorbed by the plant and converted into energy the plant can utilize for growth. In the body, light sensitive chromophores and other elements within the cell absorb energy, initiating series of important photochemical changes such as increased production of nitric oxide, singlet oxygen and ATP, as well as an increase in the cell membrane's permeability. Some effects of Cold Laser Therapy include: