# Hydrogen-rich water prevents lipid deposition in the descending aorta in a rat periodontitis model.
> ラット歯周炎モデルにおける水素水摂取による下行大動脈への脂質沈着抑制効果


## Abstract

Periodontitis is associated with early atherosclerotic changes through oxidative stress mechanisms. This animal study used 18 male Wistar rats (8 weeks old) divided into three groups: periodontitis alone, periodontitis with hydrogen-rich water (HW), and untreated controls. Periodontitis was induced by ligature placement for 4 weeks; the HW group received water containing 800–1000 μg/L of dissolved hydrogen throughout the experimental period. Rats with periodontitis alone exhibited lipid deposition in the descending aorta, along with elevated serum reactive oxygen species (1.7-fold), oxidized LDL cholesterol (1.4-fold), and increased aortic nitrotyrosine (7.9-fold) and hexanoyl-lysine (16.0-fold) compared with controls. In the HW group, all these markers were significantly reduced relative to the periodontitis-only group, and aortic lipid deposition was diminished. These findings indicate that HW consumption may attenuate periodontitis-driven aortic lipid accumulation by lowering systemic oxidized LDL and local vascular oxidative stress.

### Mechanism

Dissolved hydrogen scavenges reactive oxygen species, thereby reducing circulating oxidized LDL cholesterol and suppressing aortic nitrotyrosine and hexanoyl-lysine accumulation, which collectively attenuate lipid deposition in the vessel wall.

## Bibliographic

- **Authors**: Ekuni D, Tomofuji T, Endo Y, Kasuyama K, Irie K, Azuma T, et al.
- **Journal**: Arch Oral Biol
- **Year**: 2012
- **PMID**: [22607937](https://pubmed.ncbi.nlm.nih.gov/22607937/)
- **DOI**: [10.1016/j.archoralbio.2012.04.013](https://doi.org/10.1016/j.archoralbio.2012.04.013)
- **Study type**: animal study
- **Delivery route**: hydrogen-rich water
- **Effect reported**: positive

## 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 22607937. https://h2-papers.org/en/papers/22607937
> **Source**: PubMed PMID [22607937](https://pubmed.ncbi.nlm.nih.gov/22607937/)