Infrared light isn’t one-size-fits-all; There are three types of infrared light: near, mid, and far, and the body absorbs each one at different levels. For example, near infrared (NIR) is absorbed at a cellular level, making it ideal for boosting mitochondria and increasing collagen production. NIR will also deliver the lowest heat level, warming the body rather than causing the type of heat that leads to perspiration. Far infrared (FIR) penetrates deeper into the body because it’s soaked up by water molecules in the body. This helps improve health at a cellular level because the light can reach muscles and tissues. As such, FIR will raise core body temperature and stimulate sweat glands because it creates more heat. Mid infrared (MIR) acts a lot like FIR, and helps with heart health, circulation, pain relief and muscle recovery.