Far Infrared Rays Provide Many Health Benefits Including Negative Ionic Charges
The sun emits many kinds of natural light, only some of which are visible. Infrared light has a longer wavelength than the visible spectrum and thus cannot be seen by the naked eye.
Far infrared rays (FIR) have the longest wavelength of any kind of infrared light, and thus are the only kind of infrared light that can deeply penetrate the human body. When emitted by the sun or and infrared sauna, FIR penetrates through the skin to the subcutaneous tissues and is transformed from light energy into heat energy, bringing about many beneficial effects: