Infrared saunas use infrared light to heat your body from within. As well as helping to increase blood circulation and providing a calming effect, infrared saunas can penetrate tissues to relieve aches and pains. They also help to induce perspiration, which is one the safest and most natural ways to detoxify the body. Sweating helps to eliminate heavy metals and other toxins, including those that cause fat storage, which in turn helps to slow down the aging process.