Short answer: what does the research say about terahertz? It is real physics with real uses, mostly in imaging and sensing. As a wellness or therapy tool, the research is early.
What does the research say about terahertz?
- Where it sits: between microwaves and infrared, about 0.1 to 10 THz.[1]
- Skin: water absorbs terahertz strongly, so it reaches only the outer layers, a fraction of a millimetre to a few millimetres.[1]
- Imaging: the biggest medical use described is imaging, for example testing whether it can help spot skin cancers.[1]
- As therapy: a 2021 review says it "is still at the initial stage of its development", the data on safe limits is "rather limited", and results across groups don't always agree.[2]
Our view
We think that honesty is the point: early, interesting, and not yet proven for health benefits. Many visitors tell us they feel calm and comfortable after a session, which is their experience, not a medical finding.
Sources
- Wang et al. (2021), THz Sensing of Human Skin: A Review of Skin Modeling Approaches, Sensors 21(11)
- Cherkasova et al. (2021), Cellular effects of terahertz waves, Journal of Biomedical Optics
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.