Emerging Clinical Applications for Molecular Hydrogen.
Bao Nguyen Puente, Victoria Habet, Craig R Wheeler, John N Kheir · Respiratory care · 2026
Research-use notice
Independent study record
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H2HUBB TAKEAWAY
This narrative review examined the current clinical experience with inhaled H₂ therapy, discusses key challenges and limitations in the existing literature, and identifies areas of interest for future research, including the development of a validated delivery system to enable broader clinical investigation and application of H₂ therapy. Published clinical findings are encouraging, although data are limited by small sample sizes, methodological variability, and the absence of standardized and validated commercially available delivery systems. Published clinical findings are encouraging, although data are limited by small sample sizes, methodological variability, and the absence of standardized and validated commercially available delivery systems. The reviewed evidence supports molecular hydrogen's therapeutic potential. Additional well-designed studies are needed to clarify clinical safety and effectiveness.
What the Review Examined
This narrative review summarizes the current clinical experience with inhaled H₂ therapy, discusses key challenges and limitations in the existing literature, and identifies areas of interest for future research, including the development of a validated delivery system to enable broader clinical investigation and application of H₂ therapy.
Main Findings Across the Literature
Published clinical findings are encouraging, although data are limited by small sample sizes, methodological variability, and the absence of standardized and validated commercially available delivery systems.
Areas of Agreement or Uncertainty
Published clinical findings are encouraging, although data are limited by small sample sizes, methodological variability, and the absence of standardized and validated commercially available delivery systems.
Authors’ Conclusion
The authors concluded that published clinical findings are encouraging, although data are limited by small sample sizes, methodological variability, and the absence of standardized and validated commercially available delivery systems.
Limitations Reported by the Authors
Published clinical findings are encouraging, although data are limited by small sample sizes, methodological variability, and the absence of standardized and validated commercially available delivery systems.