# Effects of hydrogen-rich water on aging periodontal tissues in rats.
> 水素水摂取がラット加齢性歯周組織に与える影響


## Abstract

Oxidative stress is a key contributor to age-associated inflammatory processes in periodontal tissues. This animal study examined whether long-term consumption of hydrogen-rich water could modify age-related oxidative and inflammatory changes in healthy rats. Male Fischer 344 rats (4 months old, n=12) were allocated to either a hydrogen-rich water group or a distilled water control group and maintained until 16 months of age. At the endpoint, periodontal oxidative damage was significantly lower in the hydrogen-rich water group compared with controls. However, interleukin-1β protein expression did not differ between groups. Notably, gene expression of NLRP3 inflammasome components was elevated in the hydrogen-rich water group relative to controls. These findings suggest that hydrogen-rich water consumption may reduce age-related oxidative damage in periodontal tissues, while its influence on inflammatory signaling pathways appears limited or complex.

### Mechanism

Hydrogen-rich water scavenges reactive oxygen species in periodontal tissues, reducing age-related oxidative damage. However, NLRP3 inflammasome gene expression was upregulated without corresponding changes in IL-1β protein, suggesting the anti-inflammatory effect is limited or pathway-specific.

## Bibliographic

- **Authors**: Tomofuji T, Kawabata Y, Kasuyama K, Endo Y, Yoneda T, Yamane M, et al.
- **Journal**: Sci Rep
- **Year**: 2014 (2014-07-02)
- **PMID**: [24985521](https://pubmed.ncbi.nlm.nih.gov/24985521/)
- **DOI**: [10.1038/srep05534](https://doi.org/10.1038/srep05534)
- **PMC**: [PMC4078318](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4078318/)
- **Study type**: animal study
- **Delivery route**: hydrogen-rich water
- **Effect reported**: mixed

## Delivery context

Hydrogen-rich water is a low-risk delivery route, but the achievable systemic hydrogen dose is bounded. For clinical applications, inhalation is the most efficient route; inhalation, however, carries explosion risk, and concentration matters (empirical LFL of 10% applies to inhalation environments; high-concentration devices are documented in the Consumer Affairs Agency accident database and are not recommended).

## Safety notes

Hydrogen-rich water is a low-risk delivery route, but the achievable systemic hydrogen dose is bounded. For clinical applications, inhalation is the most efficient route; inhalation, however, carries explosion risk, and concentration matters (empirical LFL of 10% applies to inhalation environments; high-concentration devices are documented in the Consumer Affairs Agency accident database and are not recommended).

See also:
- [Inhalation concentration and LFL / UFL](https://h2-papers.org/en/safety-notes/inhalation-concentration)
- [Consumer Affairs Agency accident cases](https://h2-papers.org/en/safety-notes/accident-cases)
- [Inhalation safety threshold lineage](https://h2-papers.org/en/safety-notes/lineage)

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> **Cite as**: H2 Papers — PMID 24985521. https://h2-papers.org/en/papers/24985521
> **Source**: PubMed PMID [24985521](https://pubmed.ncbi.nlm.nih.gov/24985521/)