The Effects of the I-Tera Care Device on the Physical Properties of Different Water Samples

Water is one of the most unique and essential substances on Earth. Consumer wellness products that claim to improve water quality through terahertz (THz) technology have surpassed independent scientific verification. This study critically examines the effects of the I-Tera Care device on the physicochemical properties of water and evaluates the scientific plausibility of terahertz–water interaction claims through an integrated experimental and evidence-based approach. A mixed-method design was employed, combining laboratory measurements with a systematic literature review conducted in accordance with PRISMA 2020 guidelines.
Four water types with different ionic compositions, bottled water, mineral water, tap water, and rainwater, were exposed to the I-Tera Care device under controlled conditions. Electrical conductivity (EC), total dissolved solids (TDS), pH, and temperature were all assessed both before and after exposure. The findings revealed measurable but non-uniform differences in EC, TDS, and pH across water types. Bottled, mineral, and tap water all had higher EC and TDS levels, however rainwater had lower levels, as well as a significant increase in pH. Notably, temperature increased consistently across all samples, showing that thermal effects are a substantial confounding factor in interpreting the reported physicochemical changes.
Synthesis of the reviewed literature demonstrates that while THz radiation can transiently modulate hydrogen-bond dynamics and ionic mobility in aqueous systems, such effects are reversible and do not constitute permanent structural modification of water. Taken together, the findings indicate that exposure to the I-Tera Care device induces short-term physicochemical variations that are strongly mediated by water composition and temperature. The results do not provide empirical support for claims of sustained water restructuring or therapeutic benefit. This study underscores the necessity for rigorous thermal control, advanced spectroscopic validation, and biologically relevant outcome measures in future evaluations of THz-based wellness technologies.

I-Tera Care, terahertz device

1. American Public Health Association (APHA). (2017). Standard methods for the examination of water and wastewater (23rd ed.). American Public Health Association. [Google Scholar] [Crossref]

2. Ball, P. (2008).Water as an active constituent in cell biology. Chemical Reviews, 108(1), 74–108. https://doi.org/10.1021/cr068037a [Google Scholar] [Crossref]

3. Chaplin, M. (2006). Do we underestimate the importance of water in cell biology? Nature Reviews Molecular Cell Biology, 7(11), 861–866. https://doi.org/10.1038/nrm2021 [Google Scholar] [Crossref]

4. Coulson, J. M., & Richardson, J. F. (2019). Chemical engineering: Volume 1 – Fluid flow, heat transfer, and mass transfer (6th ed.). Elsevier. [Google Scholar] [Crossref]

5. Hem, J. D. (1985). Study and interpretation of the chemical characteristics of natural water (3rd ed.). U.S. Geological Survey Water-Supply Paper 2254. [Google Scholar] [Crossref]

6. Heyden, M., & Havenith, M. (2010). Combining THz spectroscopy and MD simulations to study water dynamics. Journal of the American Chemical Society, 132(19), 6528–6530. [Google Scholar] [Crossref]

7. https://doi.org/10.1021/ja100516k [Google Scholar] [Crossref]

8. Huang, J., & Liu, H. (2020). The effects of terahertz radiation on water clusters and hydrogen bonding. Scientific Reports, 10(1), 1215. [Google Scholar] [Crossref]

9. Kell, G. S. (1975). Density, thermal expansivity, and compressibility of liquid water from 0° to 150°C: Correlations and tables for atmospheric pressure and saturation reviewed and expressed on 1968 temperature scale. Journal of Chemical & Engineering Data, 20(1), 97–105. https://doi.org/10.1021/je60064a005 [Google Scholar] [Crossref]

10. Markelz, A. G. (2008). Terahertz dielectric sensitivity to biomolecular structure and function. IEEE Journal of Selected Topics in Quantum Electronics, 14(1), 180–190. [Google Scholar] [Crossref]

11. https://doi.org/10.1109/JSTQE.2007.911295 [Google Scholar] [Crossref]

12. Ministry of Health Malaysia. (2022). Guidelines for Drinking Water Quality Standards. [Google Scholar] [Crossref]

13. Nagai, M., Yada, H., Arikawa, T., & Tanaka, K. (2019). Terahertz time-domain spectroscopy of water dynamics. Journal of Infrared, Millimeter, and Terahertz Waves, 40, 101–113. [Google Scholar] [Crossref]

14. https://doi.org/10.1007/s10762-018-0555-6 [Google Scholar] [Crossref]

15. Sawyer, C. N., McCarty, P. L., & Parkin, G. F. (2013). Chemistry for environmental engineering and science (5th ed.). McGraw-Hill Education. [Google Scholar] [Crossref]

16. Stumm, W., & Morgan, J. J. (1996). Aquatic chemistry: Chemical equilibria and rates in natural waters (3rd ed.). Wiley. [Google Scholar] [Crossref]

17. World Health Organization (WHO). (2017). Guidelines for drinking-water quality (4th ed.). World Health Organization. [Google Scholar] [Crossref]

18. Xu, J., Plaxco, K. W., & Allen, S. J. (2020). Probing water dynamics with terahertz spectroscopy. Proceedings of the National Academy of Sciences of the United States of America, 117(6), 2809–2814. https://doi.org/10.1073/pnas.1912941117 [Google Scholar] [Crossref]

19. Zhao, Y., et al. (2021). Terahertz spectroscopy and its application in water structure analysis. Journal of Applied Physics, 130(9), 091101. [Google Scholar] [Crossref]

• Green Synthesis of Calcium Oxide Nanoparticles from Pigeon Eggshells for Cement Composites
• Needs Analysis: Development of an Interactive Digital Storybook in Teaching Mixtures and their Characteristics among Grade 6 Learners
• Thickness Dependent Structural, Optical, Electrical and Gas Sensing properties of ZnO thin film
• Forensic Chemistry Laboratory Works from Home: Challenges Encountered by Criminology Students During the Conduct of their Laboratory Activities at Home
• The Concept of Wellness Club and How it Differs from the Present Gym?