Nano-Bubble Hydrogen Water Shows Higher Antioxidant Activity in Lab Tests
Antioxidant activities of nano-bubble hydrogen-dissolved water assessed by ESR and 2,2′-bipyridyl methods
Research hubs: Oxidative Stress
This research was done on cells or tissue in a lab, not in people or animals.
- Evidence type
- Laboratory study (cells or tissue)
- Authors
- Shinya Kato, Daigo Matsuoka, Nobuhiko Miwa
- Journal
- Materials Science and Engineering C
- Year
- 2015
- PMID
- 26042683
- Study Type
- Molecular Assay
- Delivery
- Water (Dissolved)
- H₂ concentration
- 0.678 ppm
- Outcome
- Positive
- Peer Reviewed
- Yes
- Cited by
- 39 (OpenAlex, as of November 2026)
- Country
- Japan
TL;DR
Nano-bubble hydrogen water is better at neutralizing harmful molecules than other types of hydrogen water, even when they have similar hydrogen levels.
Key Finding
Nano-bubble hydrogen water showed superior hydroxyl radical-scavenging activity compared to conventional hydrogen water and pure water in laboratory tests, with the nano-bubble structure appearing more important than dissolved hydrogen concentration alone.
Summary
Researchers created water containing tiny hydrogen bubbles (smaller than 717 nanometers) and tested whether it could neutralize harmful molecules called hydroxyl radicals. Using two different laboratory tests, they compared this nano-bubble hydrogen water to regular water, tap water, and other types of hydrogen water. The nano-bubble version showed the strongest ability to neutralize hydroxyl radicals and demonstrated antioxidant activity (the ability to prevent damage from oxidation), suggesting that the bubble structure itself may be more important than just the amount of dissolved hydrogen.
Practical Takeaway
This is a laboratory study only—it does not involve human testing or real-world conditions. While the results suggest nano-bubble hydrogen water may have stronger antioxidant properties in test tubes than other types of hydrogen water, this does not yet demonstrate health benefits in people. Much more research, including human trials, would be needed before any health claims could be made.
Abstract (excerpt)
We prepared nano-bubble hydrogen-dissolved water (nano-H water) which contained hydrogen nano-bubbles of <717-nm diameter for 54% of total bubbles. In the DMPO-spin trap electron spin resonance (ESR) method, the DMPO-OH:MnO ratio, being attributed to amounts of hydroxyl radicals (OH), was 2.78…