International Journal of Biometeorology

, Volume 33, Issue 3, pp 145–150

Biological activities caused by far-infrared radiation

  • Shojiro Inoué
  • Morihiro Kabaya


Contrary to previous presumption, accumulated evidence indicates that far-infrared rays are biologically active. A small ceramic disk that emist far-infrared rays (4–16 μm) has commonly been applied to a local spot or a whole part of the body for exposure. Pioneering attempts to experimentally analyze an effect of acute and chronic radiation of far-infrared rays on living organisms have detected a growth-promoting effect in growing rats, a sleep-modulatory effect in freely behaving rats and an insomiac patient, and a blood circulation-enhancing effect in human skin. Question-paires to 542 users of far-infrared radiator disks embedded in bedelothes revealed that the majority of the users subjectively evaluated an improvement of their health. These effects on living organisms appear to be non-specifically triggered by an exposure to far-infrared rays, which eventually induce an increase in temperature of the body tissues or, more basically, an elevated motility of body fluids due to decrease in size of water clusters.

Key words

Far-infrared radiation Growth Health Skin blood flow Sleep 


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Copyright information

© International Society of Biometeorology 1989

Authors and Affiliations

  • Shojiro Inoué
    • 1
  • Morihiro Kabaya
    • 2
  1. 1.Institute for Medical and Dental EngineeringTokyo Medical and Dental UniversityTokyoJapan
  2. 2.Japan Research Laboratory of Sleep ScienceTokyoJapan

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