The heat generated by an infrared sauna stimulates energy at a cellular level which, in turn, increases the body’s production of white blood cells. These cells form a component of your blood and act as your immune system’s first line of defense when infection strikes. When a harmful substance enters your body, white blood cells detect it and control the immune system’s response. Clearly, these small cells are critical when it comes to the functionality of our immune systems. An increased production of white blood cells, as stimulated by infrared sauna use, can help the body to more effectively fight off illnesses.