Hydrogen Water Protects Against Noise-Induced Hearing Loss in Mice
- Authors
- Shufen Li, Junlian Yin, Yibing Hu, Chenyang Yuan, Hongbing Yu, Xiaoxu Zhang, Shuyue Yu, Zhenyun Zhou, Hongqun Jiang, Yazhi Xing, Yuanping Xiong
- Journal
- Ecotoxicology and Environmental Safety
- Year
- 2026
- DOI
- 10.1016/j.ecoenv.2026.120297
- Study Type
- Mouse
- Outcome
- Positive
- Peer Reviewed
- Yes
- Country
- China
- Health Condition
- Noise-Induced Hearing Loss
- Body System
- Auditory
TL;DR
Hydrogen nanobubble water improved hydrogen stability and reduced noise-induced hearing damage in mice by protecting cochlear structure, limiting inflammatory signaling, and helping restore gut microbial balance.
Key Finding
Hydrogen nanobubble water reduced noise-induced hearing loss in mice by restoring gut bacterial balance and suppressing inflammatory signaling in both intestinal and cochlear tissues.
Summary
Researchers tested hydrogen nanobubble water (a special form of hydrogen-infused water) in mice exposed to loud noise to see if it could prevent hearing damage. The study found that this water reduced hearing loss, protected nerve structures in the inner ear, and restored balance to gut bacteria that had been disrupted by noise exposure. The protective effects appeared to work by reducing inflammation and harmful molecules called reactive oxygen species in both the gut and inner ear.
Practical Takeaway
This early-stage mouse study suggests hydrogen water may have potential to protect hearing from noise damage through gut-related mechanisms, but human studies are needed before any conclusions can be drawn about its effectiveness in people. The findings are promising but remain preliminary and cannot yet support health claims for human use.
Abstract
Environmental noise is a widespread stressor that leads to auditory dysfunction and systemic inflammatory disturbances. Noise-induced hearing loss (NIHL) remains a major environmental health concern, yet effective preventive strategies remain limited. Increasing evidence suggests that environmental stress may disrupt gut microbial balance and promote inflammation that leads to distant organs, including cochlea. Here, we demonstrate that hydrogen nanobubble water (HNW), an improved and stabilized oral formulation of molecular hydrogen, reduces cochlear injury induced by noise exposure. Compared with conventional hydrogen-rich water, HNW improved hydrogen retention and stability. In a mouse model of acoustic trauma, oral HNW attenuated auditory threshold shifts and preserved synaptic structure and auditory nerve fiber organization at the nodes of Ranvier. Noise exposure was associated with altered gut microbial composition and activated NF-κB-mediated inflammatory signaling in both intestinal and cochlear tissues. HNW restored microbial balance and attenuated NF-κB activation, and reduced expression of pro-inflammatory cytokines and intracellular reactive oxygen species. These effects were associated with preservation of blood-labyrinth barrier integrity and stabilization of the cochlear immune microenvironment. Collectively, these findings indicate that gut microbiota-associated pathways are involved in noise-induced hearing loss and emphasize the potential of HNW as a strategy to reduce environmentally induced auditory injury.