Infrared light penetrates to the inner layers of the skin at around 2-7cm deep. This means the light is able to reach muscle, nerve and even bone. The infrared light enters the body and is absorbed by photoreceptors located within the cell. Once absorbed the light energy then triggers a series of metabolic events on the cellular level. 

Infrared therapy increases the production of nitric oxide within the body. Nitric oxide is a gas that's vital to the body's organs. It is a cell signaling molecule that helps relax the arteries, reduce oxidative stress (by battling free radicals), regulates blood pressure and prevents platelet clumping in the vessels. This is how Infrared light enhances blood circulation to deliver vital nutrients and oxygen to damaged/injured tissues in the body. Stimulating the regeneration and repair of injured tissues while reducing pain and inflammation.