How Hydrogen Gas, Nitric Oxide, and H2S All Activate the Same Cellular Defense Switch
- Authors
- Te Xiao, Chao Xia, Lisha Huang, Yanqi Li, Mengyu Liu, Pengxiang Zhao, Xuemei Ma, Fei Xie
- Journal
- Medical Gas Research
- Year
- 2026
- DOI
- 10.4103/mgr.MEDGASRES-D-26-00086
- Study Type
- clinical
- Peer Reviewed
- Yes
- Country
- China
- Health Condition
- Ischemia-Reperfusion Injury
- Body System
- Cardiovascular
TL;DR
Three "therapeutic gases" — hydrogen, nitric oxide, and hydrogen sulfide — all help protect your cells from damage by activating the same built-in defense system, just in different ways. Scientists think using all three together might work better than using just one, which could someday lead to new treatments for diseases like Alzheimer's, heart attacks, and diabetes.
Key Finding
Molecular hydrogen activates the Nrf2/Keap1 cellular defense pathway indirectly — by reducing oxidative stress upstream — rather than by directly modifying proteins the way nitric oxide and hydrogen sulfide do.
Summary
This review article examines how three therapeutic gases — nitric oxide, hydrogen sulfide, and molecular hydrogen — all influence the same cellular defense system, called the Nrf2/Keap1 pathway (a master switch that helps cells respond to stress and damage). The authors compare the chemistry of each gas, noting that nitric oxide and hydrogen sulfide directly modify proteins, while hydrogen appears to work more indirectly by reducing upstream oxidative stress. The review also explores how these gases may interact with each other and discusses challenges in turning these findings into real medical treatments.
Practical Takeaway
This is a review of existing research, not a clinical trial, so it does not test hydrogen water in people. It suggests that hydrogen may support cellular antioxidant defenses through a distinct biological route, but the authors are clear that major hurdles — including finding the right dose and delivery method — must be solved before any clinical recommendations can be made.
Abstract (excerpt)
The nuclear factor erythroid 2-related factor 2/Kelch-like Ech-associated protein 1 (Nrf2/Keap1) pathway is a central homeostatic module that integrates oxidant, electrophilic, inflammatory, and metabolic signals into adaptive transcriptional programs. In parallel, nitric oxide (NO), hydrogen…