Oxy-hydrogen gas (HHO) is a gaseous mixture of molecular hydrogen and molecular oxygen that is generated by the electrolysis of water and delivered in a 2:1 ratio (66% and 33%, respectively) through
respiratory conditions, including asthma, chronic obstructive pulmonary disorder, and, pertinently · EMJ Respiratory 2021 · 2021
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
This narrative review examined the biological rationale and early clinical evidence for oxy-hydrogen inhalation in respiratory conditions. The authors highlighted early evidence of cytoprotective, antioxidant, and anti-inflammatory effects. The reviewed evidence adds support for molecular hydrogen's therapeutic potential across the conditions, mechanisms, or outcomes examined.
What the Findings Mean
H2HUBB reviewed this publication as a synthesis of molecular-hydrogen research and summarizes the outcomes emphasized by the authors. Mounting evidence suggests this is important when considering respiratory medicine because elevated levels of granulocytic cells are often observed in the bronchoalveolar lavage fluid of patients with astringent pulmonary diseases.5,6 ROS delivered by such granulocytes can be extremely damaging to biomolecules, including proteins, carbohydrates, lipids, and nucleotides, with intense and acute elevation of ROS consistent with acute and chronic inflammatory conditions.7 Within the delicate parenchymal tissue, such assault often induces degeneration of epithelial cells, producing hyalin fluid.
What the Researchers Studied
The authors reviewed the biological rationale and early clinical evidence for oxy-hydrogen inhalation in respiratory conditions.
What Effects Did Molecular Hydrogen Have?
33% inhaled H₂ concentration. Mounting evidence suggests this is important when considering respiratory medicine because elevated levels of granulocytic cells are often observed in the bronchoalveolar lavage fluid of patients with astringent pulmonary diseases.5,6 ROS delivered by such granulocytes can be extremely damaging to biomolecules, including proteins, carbohydrates, lipids, and nucleotides, with intense and acute elevation of ROS consistent with acute and chronic inflammatory conditions.7 Within the delicate parenchymal tissue, such assault often induces degeneration of epithelial cells, producing hyalin fluid. Instead, granulocytes utilise NADPH oxidase enzymes to produce a highly oxidative respiratory burst containing a myriad of ROS,4 which can include superoxide anions, hydrogen peroxide, hydroxyl radicals (in the presence of iron [Fe] ions), and hypochlorous acid, the latter through the action of myeloperoxidase. Presumably, other modes of action of H₂ are also important as the reaction kinetics between H₂ and these respective biomolecules remain in question.13 Despite research into the efficacy of HHO therapy still being in its infancy, HHO inhalation has been recommended by the Chinese government as a treatment of nosocomial COVID-19 symptomology.14 AIMS As the global COVID-19 pandemic threatens both individual health and healthcare systems globally, and, as yet, there is little effective treatment for this novel disease, this review aims to explain the HHO generation process and the molecular benefits of combining oxygen and hydrogen inhalation therapy for COVID-19 and other inflammatory respiratory conditions.
Why These Findings Matter
The reviewed evidence adds support for molecular hydrogen's therapeutic potential across the conditions, mechanisms, or outcomes examined.
How Strong Is This Evidence?
This is review or synthesis evidence (narrative review).
Technical Study Details
H2HUBB classifies this publication as narrative review with review or synthesis evidence. The study used a narrative review. The hydrogen delivery method was oxy-hydrogen gas inhalation. The reported hydrogen concentration was 33% inhaled H₂ concentration.
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. The original scholarly source is available at https://www.emjreviews.com/wp-content/uploads/2021/05/Oxy-hydrogen-Gas-The-Rationale-Behind-Its-Use-as-a-Novel-and-Sustainable-Treatment-for-COVID-19-and-Other-Respiratory-Diseases-.pdf.