Short answer: far-infrared warmth comes from a part of the infrared range, the kind of energy we feel as gentle radiant heat (a general description).
Far-infrared warmth: what to know
- Infrared and heat: NASA's spectrum page lists "infrared heat" as an everyday example of infrared.[2]
- What research exists: a 2009 review of far-infrared sauna studies found limited moderate evidence for normalising blood pressure and treating congestive heart failure, fair evidence from a single study for chronic pain, weak evidence for chronic fatigue and obesity, and consistent fair evidence against claims that it lowers cholesterol.[4]
- Limits: the review notes the evidence is limited compared with manufacturers' marketing, and sauna studies are not studies of our devices.[4]
- Our Body Rejuvenator lists graphene far-infrared warmth among its technologies; we describe it as warmth, not treatment.[8]
When to see a doctor
See a doctor before heat if you have heart trouble, numbness or diabetes.
Sources
- NASA Science, The electromagnetic spectrum
- Beever R (2009), Far-infrared saunas for treatment of cardiovascular risk factors: summary of published evidence, Canadian Family Physician 55(7):691-6
- Prife iTeraCare, Amazing Body Rejuvenator
Written by the Prife iTeraCare team and last reviewed on 10 October 2026. This is general information, not medical advice, and it does not replace your doctor or physiotherapist. A session is a wellness experience, not a medical treatment.
Book a free session and see iTeraCare for yourself at our Anna Nagar centre.