Far infrared (FIR) radiation (λ = 3–100 μm) is a subdivision of the electromagnetic spectrum that
has been investigated for biological effects. The goal of this review is to cover the use of a further
sub-division (3– 12 μm) of this waveband, that has been observed in both in vitro and in vivo
studies, to stimulate cells and tissue, and is considered a promising treatment modality for certain
medical conditions. Technological advances have provided new techniques for delivering FIR
radiation to the human body. Specialty lamps and saunas, delivering pure FIR radiation
(eliminating completely the near and mid infrared bands), have became safe, effective, and widely
used sources to generate therapeutic effects. Fibers impregnated with FIR emitting ceramic
nanoparticles and woven into fabrics, are being used as garments and wraps to generate FIR
radiation, and attain health benefits from its effects.
