Far infrared is part of the sun's invisible light specturm that is essential to plants, animals and humans. Infrared heat is a form of energy that penetrates the body by warming muscles and tissue directly without heating the intervening air. The body produces infrared energy to keep us warm and repair body tissue. Far infrared energy is radiated through the skin at 3 to 50 microns with the greatest output at 9.4 microns. Occasionally the infrared energy in our body tissue needs a boost to insure healing and tissue repair. The body will selectively absorb infrared to boost a tissue's infrared energy. This process is called resonant absorption. Far infrared rays are completely safe and are used in hospitals to warm newborn babies.
source:http://www.firtrader.com
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