“…Over the past two decades, the biological benefits of FIR have been studied and have served as a treatment of vascular-related disorders [1,2,3]. At a wavelength ranging between 4 and 14 μm [4,5,6], the FIR can trigger both thermal and non-thermal effects at the molecular level to affect the health of a whole living organism [1,2,3,4,5,6,7,8,9,10,11,12,13,14]. Through the resonance absorption process of the human body, the FIR can operate from inside tissues to promote body metabolism more effectively than a single heating of the skin surface.…”