Molecular hydrogen inhalation modulates resting metabolism in healthy females: findings from a randomized, double-blind, placebo-controlled crossover study.
Pavel Grepl, Michal Botek, Jakub Krejčí, Andrew McKune · Medical gas research · 2025
Research-use notice
Independent study record
Each H2HUBB study page organizes source-linked research details for educational use. Interpretation should remain proportional to the study design, population, controls, and limitations.
H2HUBB TAKEAWAY
In Twenty, physically active female participants aged 22, compared with placebo (ambient air), molecular hydrogen inhalation significantly decreased respiratory exchange ratio and ventilation across all intervals. These findings add human evidence supporting molecular hydrogen's therapeutic potential across the specific human outcomes evaluated in this study.
What the Findings Mean
H2HUBB reviewed how molecular hydrogen affected the outcomes measured in Twenty, physically active female participants aged 22. Compared with placebo (ambient air), molecular hydrogen inhalation significantly decreased respiratory exchange ratio and ventilation across all intervals.
What the Researchers Studied
The researchers studied Twenty, physically active female participants aged 22. The study used a randomized, double-blind, placebo-controlled, crossover human clinical trial. The comparison condition was placebo.
What Effects Did Molecular Hydrogen Have?
300 mL/min H₂ output; reported treatment duration: 60 minutes. Compared with placebo (ambient air), molecular hydrogen inhalation significantly decreased respiratory exchange ratio and ventilation across all intervals. The authors concluded that, 60 minutes of resting molecular hydrogen inhalation significantly increased resting fat oxidation, as evidenced by decreased respiratory exchange ratio, particularly in individuals with higher body fat percentages.
Why These Findings Matter
These findings add human evidence supporting molecular hydrogen's therapeutic potential across the specific human outcomes evaluated in this study and contribute to the growing body of molecular-hydrogen research.
How Strong Is This Evidence?
This is human clinical evidence from a randomized, double-blind, placebo-controlled, crossover human clinical trial. H2HUBB interprets the findings in the context of the study design, sample, comparator, and measured outcomes rather than using one publication as a verdict on hydrogen therapy.
Technical Study Details
H2HUBB classifies this publication as human clinical study with human clinical evidence. The research population or model was Twenty, physically active female participants aged 22. The study used a randomized, double-blind, placebo-controlled, crossover human clinical trial. H2HUBB translates the reported hydrogen dose as 300 mL/min H₂ output. The reported treatment duration was 60 minutes.
Limitations and Safety
No separate limitations or safety findings were identified in the source text available to H2HUBB.
Original Study and H2HUBB Research Context
H2HUBB presents this source-grounded research record as one contribution to the broader molecular-hydrogen evidence base.