How Hydrogen Targets Mitochondria to Boost Cell Energy Production

Authors
Journal
Redox Biology
Year
DOI
10.1016/j.redox.2026.104003
Study Type
clinical
Peer Reviewed
Yes
Country
Serbia
Health Condition
Mitochondrial Disorders
Body System
Cellular

TL;DR

Scientists discovered that hydrogen gas doesn't just clean up harmful molecules in your cells like we thought—it actually sends signals that slow down a specific energy-making machine in your mitochondria, which could help treat diseases. This finding is important because it means hydrogen might help people in a totally different way than doctors expected.

Key Finding

Molecular hydrogen appears to function as a signaling molecule that modulates mitochondrial activity through the Rieske iron-sulfur protein (RISP) and protein degradation pathways, rather than working simply as a general antioxidant.

Summary

This study examines how molecular hydrogen (H2) works inside cells' energy-producing structures called mitochondria. Rather than simply neutralizing harmful molecules as previously thought, the research suggests H2 may act as a signaling molecule that affects a protein called RISP, which then triggers the breakdown of other proteins. However, the authors note that other similar proteins in mitochondria might also play important roles, and more research is needed to determine exactly which protein H2 targets first.

Practical Takeaway

This is a theoretical framework paper, not an experimental study with human or animal results, so it does not provide direct evidence about hydrogen water's effects on health. The authors propose that H2 may work through sophisticated cellular mechanisms rather than simple antioxidant action, but they explicitly state that further research is needed to confirm which proteins are actually involved. Anyone considering hydrogen water should await studies that test these proposed mechanisms experimentally.

Abstract

A recent study published in Redox Biology (Volume 88, December 2025, 103952) demonstrates that molecular hydrogen (H2) rapidly suppresses mitochondrial Complex III activity through a mechanism involving the Rieske iron-sulfur protein (RISP) and subsequent LONP1-dependent proteolysis, challenging the long-standing view of H2 as merely a selective radical scavenger. While these findings compellingly identify RISP as a key mediator of mitochondrial responses to H2, its designation as the primary molecular target warrants broader consideration. From an evolutionary and structural standpoint, RISP belongs to a wider family of hydrogenase-like mitochondrial redox proteins that retain ancient iron-sulfur architectures. Proteins such as succinate dehydrogenase subunit B (SDHB), iron-sulfur subunits of Complex I, and CISD family [2Fe-2S] proteins share comparable redox logic and strategic positioning within mitochondrial bioenergetic networks. Here, these candidates are prioritized and placed into a hierarchical, testable framework, and specific comparative structural, biochemical, and proteostatic approaches are proposed to define the true molecular entry point of H2 signaling in human mitochondria.