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Observational StudyHighlighted

Association Between Hydrogen-Rich Water Consumption and Lower Extremity Function in Older Adults Participating in Community Salons: A Prospective Observational Study

MHID-67657942026medRxiv

Yuusuke Harada, Michiko Miyakawa

Background: Falls among older adults are a leading cause of fractures, loss of independence, and need for long-term care. Community salons in Japan promote social participation and health activities among older adults. Hydrogen-rich water is widely used as a health product, but evidence in community settings remains limited. Methods: We conducted a prospective observational study among 48 communit

Clinical TrialAnimal StudyHighlighted

Effect of hydrogen inhalation on functional characteristics and intestinal gas biomarkers in wrestlers during physical exercise

MHID-05612832025Sportivnaya meditsina: nauka i praktika (Sports medicine: research and practice)

Oleg S. Medvedev, Aleksey A. Uzhakov, Olga L. Konnova, Oxana V. Povarova

Purpose of the study: to investigate the effect of periodic hydrogen inhalations for one month on the main performance characteristics, lactate levels and other biochemical parameters determined in the blood of young wrestlers after physical activity. Materials and methods. 10 healthy volunteer athletes took part in a prospective clinical study. The analysis of hydrogen and methane levels in exha

Observational Study

The impact of graded exercise to exhaustion on breath hydrogen: a pilot study

MHID-31585802025Sport Sciences for Health

Nikola Todorovic, Jovan Kuzmanovic, Dejan Javorac, Sergej M Ostojic

Purpose Exercise induces transient physiological disruptions, including immune suppression and gastrointestinal (GI) disturbance. Molecular hydrogen (H₂), an endogenously produced gas with antioxidant and anti-inflammatory properties, may play a protective role in this context. While the therapeutic potential of exogenous H₂ has been widely explored, little is known about endogenous hydrogen respo

Clinical TrialHighlighted

Hydrogen-rich water supplementation exhibits dose- and age-dependent effects on delayed-onset muscle soreness in professional soccer players

MHID-96660182025Journal of Physical Education and Sport

Jakub Krejčí, Michal Botek, Shigeo Ohta, Klara Botkova, Andrew McKune

Problem Statement: Effective inter-match recovery plays a crucial role in preserving performance and preventing injuries in well-trained soccer players. In this context, molecular hydrogen has attracted increasing attention in sports science due to its selective antioxidative, anti-inflammatory, and cell-signaling properties that may facilitate recovery. Among the various administration methods, h

Observational StudyHighlighted

Hemodialysis employing molecular hydrogen (H2) enriched dialysis solution may improve dialysis related fatigue through impact on energy metabolism

MHID-2151796PMID: 399341432025Scientific Reports

Masaaki Nakayama, Kimio Watanabe, Emiko Sato, Yugo Ito, Nozomi Kadota, Kasumi Konishi, et al.

Hemodialysis employing molecular hydrogen (H2)-enriched dialysis solution rendered by water electrolysis (E-HD), has been reported to alleviate dialysis-related fatigue, but its association with metabolic profiles remains unclear. Eighty-one patients undergoing standard HD were classified into 3 groups [Group A (n = 25, 30.9%): fatigue with activity reduction—subgroups A1: chronic persistent fatig

Clinical TrialObservational StudyHighlighted

Hydrogen and Methane Detection in Breath in Response to Two Different Types of Dietary Fiber and Its Relationship to Postprandial Glucose Concentration in Obese Patients with Type 2 Diabetes and Normoglycemic Subjects

MHID-1241888PMID: 400777852025Nutrients

Inna Misnikova, Yulia Kovaleva, Svetlana Shokur, Tyler W. LeBaron, Oxana Povarova, Oleg Medvedev

Background: The aim of this study was to investigate the relationship between postprandial glycemic levels based on flashmonitoring and the production of intestinal hydrogen (H2) and methane (CH4) gases based on the measurement of the amount of these gases in exhaled air. Materials and Methods: We studied 14 subjects with type 2 diabetes mellitus (T2DM) and 14 individuals without diabetes (control

Clinical TrialHighlighted

Hydrogen Gas Inhalation Improved Intestinal Microbiota in Ulcerative Colitis: A Randomised Double-Blind Placebo-Controlled Trial

MHID-8924760PMID: 408680532025Biomedicines

Takafumi Maruyama, Dai Ishikawa, Rina Kurokawa, Hiroaki Masuoka, Kei Nomura, Mayuko Haraikawa, et al.

Background/Objective: Dysbiosis is implicated in the pathogenesis of ulcerative colitis. Hydrogen has been reported to promote intestinal microbiota diversity and suppress ulcerative colitis progression in mice models. In this study, we investigated changes in the intestinal microbiota, therapeutic effects, and safety of hydrogen inhalation in patients with ulcerative colitis. Methods: In this ra

Clinical TrialHighlighted

Hydrogen’s Feasibility and Safety as a Therapy in Extracorporeal Cardiopulmonary Resuscitation (Hydrogen‑FAST): study protocol for a trial of inhaled hydrogen gas as an adjunctive therapy in refractory cardiac arrest

MHID-5491717PMID: 412043202025Trials

Victoria Habet, Tysen DeWaard, Krislyn M. Boggs, Alix Fetch, Bao Nguyen Puente, Lynn A. Sleeper, et al.

Background: Extracorporeal cardiopulmonary resuscitation (ECPR) improves survival for patients experiencing refractory cardiac arrest but is often associated with severe ischemia-reperfusion injury (IRI). Hydrogen gas (H2) has demonstrated promising preclinical efficacy in reducing IRI. The Hydrogen-FAST trial investigates the feasibility and safety of inhaled hydrogen gas as an adjunctive therapy

Clinical TrialHighlighted

Effect of hydrogen–oxygen inhalation on sleep disorders and abnormal mood: a single-blind, randomized controlled trial

MHID-9166764PMID: 408269302025Medical Gas Research

Yu Hong Gao, Jun Chen, Hua Zhong, Qiang Zhao

Sleep disorders are associated with various chronic diseases. While hydrogen has anti-inflammatory, antioxidant, and antifibrotic effects and has potential applications in disease management, its impact on sleep disorders remains unclear. This single-blind, randomized controlled clinical trial from September 2022 to July 2023 at the Second Medical Center of the PLA General Hospital and the Affilia

Literature ReviewObservational StudyHighlighted

A Case Report of Adjuvant Molecular Hydrogen Therapy in Refractory Rheumatoid Arthritis With Atlantoaxial Subluxation

MHID-3682903PMID: 411676902025IN VIVO

YOU‐CHI REN, JENG‐WEI LU, YI‐JUNG HO, SHAN‐WEN LUI, TING‐YU HSIEH, KUANG‐YIH WANG, et al.

Background/Aim: Rheumatoid arthritis (RA) is a chronic autoimmune disease affecting synovial joints, often causing to joint destruction and systemic comorbidities. Cervical spine involvement, especially atlantoaxial subluxation (AAS), can lead to spinal cord compression and neurological deficits. While disease‑modifying antirheumatic drugs (DMARDs) are standard therapy, intolerance to agents like

Clinical TrialHighlighted

Molecular hydrogen inhalation modulates resting metabolism in healthy females: findings from a randomized, double-blind, placebo-controlled crossover study

MHID-1036598PMID: 399231332025Medical Gas Research

Pavel Grepl, Michal Botek, Jakub Krejčí, Andrew McKune

Initially, molecular hydrogen was considered a physiologically inert and non-functional gas. However, experimental and clinical studies have shown that molecular hydrogen has anti-inflammatory, anti-apoptotic, and strong selective antioxidant effects. This study aimed to evaluate the effects of 60 minutes of molecular hydrogen inhalation on respiratory gas analysis parameters using a randomized, d

Clinical Trial

Effects of high concentration hydrogen water intake on active oxygen and performance in soccer players

MHID-98854012024Science & Sports

S.H. Ryu, J.H. Oh, K.W. Noh, S. Park

Summary Objective: This study aimed to contribute towards improving athletic performance by comparing the effects of highly concentrated hydrogen intake before and during exercise on soccer players’ metabolic and athletic performance. Materials and methods: This study followed a single-blind crossover design involving 10 male college soccer players. Before this experiment, the Vmax measurement a

Human StudyHighlighted

A case of lung injury due to a hydrogen explosion caused by the simultaneous use of two home folk remedies devices

MHID-3244978PMID: 396343822024Acute Medicine & Surgery

Masato Tsuchikane, Takeshi Yamagiwa, Tadaaki Takada, Shinjiro Wakai, Sadaki Inokuchi

A 62-year-old woman was diagnosed with postoperative breast cancer recurrence. While inhaling hydrogen gas through a nasal cannula at home, she used a heat-therapy machine that emitted electromagnetic waves to the breast cancer site. She suddenly experienced explosive sounds in her chest and smelled burning. Subsequently, she experienced several overlapping hemoptysis episodes and was referred to

Clinical Trial

Hydrogen-Rich Gas Enhanced Sprint-Interval Performance: Metabolomic Insights into Underlying Mechanisms

MHID-8109346PMID: 390647852024Nutrients

Gengxin Dong, Haiyan Liu, Yunji Chen, Dapeng Bao, Wentao Xu, Junhong Zhou

Background: The diversity of blood biomarkers used to assess the metabolic mechanisms of hydrogen limits a comprehensive understanding of its effects on improving exercise performance. This study evaluated the impact of hydrogen-rich gas (HRG) on metabolites following sprint-interval exercise using metabolomics approaches, aiming to elucidate its underlying mechanisms of action. Methods: Ten heal

Clinical Trial

Sixty-minute inhalation of molecular hydrogen decreases blood oxygen saturation but does not alter autonomic cardiac regulation at rest in healthy females: A randomized, double-blind, placebo-controlled crossover study

MHID-7502024PMID: 414014412024Canadian Journal of Physiology and Pharmacology

Pavel Grepl, Jakub Krejčí, Andrew McKune, Michal Botek

Molecular hydrogen has gained attention for its potential antioxidant, anti-inflammatory, and ergogenic effects. However, its impact on blood oxygen saturation and autonomic cardiac regulation under resting conditions remains unclear. This randomized, double-blind, placebo-controlled crossover study investigated the effects of a 60-minute molecular hydrogen inhalation on oxygen saturation and hear

Clinical Trial

Inhalation of Hydrogen-rich Gas before Acute Exercise Alleviates Exercise Fatigue: A Randomized Crossover Study

MHID-0740382PMID: 386986242024International Journal of Sports Medicine

Gengxin Dong, Jianxin Wu, Yinglu Hong, Qian Li, Meng Liu, Guole Jiang, et al.

Hydrogen, as an antioxidant, may have the potential to mitigate fatigue and improve selected oxidative stress markers induced by strenuous exercise. This study focused on a previously unexplored approach involving pre-exercise inhalation of hydrogen-rich gas (HRG). Twenty-four healthy adult men first completed pre-laboratories to determine maximum cycling power (Wmax) and maximum cycling time (Tma

Clinical TrialHighlighted

Hydrogen gas inhalation prior to high-intensity training reduces attenuation of nitric oxide bioavailability in male rugby players

MHID-9198954PMID: 397039112024PeerJ

Yuqi Zhao, Chaoqun Li, Shi Zhou, Zhiguang Xu, Xin Huang, Li Wen

Background: Inhalation of hydrogen gas (H2) as an antioxidant supplement may alleviate exercise-induced oxidative damage and protect post-exercise hydrogen peroxide signaling, which may help mediate beneficial exercise adaptation. The aims of this study were to determine the effects of H2 inhalation on plasma nitric oxide (NO) level and its synthesis precursor in professional athletes. Methods: A

Observational StudyHighlighted

Using oral molecular hydrogen supplements to combat microinflammation in humans: a pilot observational study

MHID-3946150PMID: 393102562024International Journal of Medical Sciences

Kuo-Cheng Lu, Min-Chung Shen, Reui-Lin Wang, Wen-Wen Chen, Szu-Han Chiu, Yung-His Kao, et al.

Background: Persistent inflammation over time can cause gradual harm to the body. Molecular hydrogen has the potential to specifically counteract reactive oxygen species (ROS), reduce disease severity, and enhance overall health. Investigations of the anti-inflammatory and antioxidant properties of oral solid hydrogen capsules (OSHCs) are currently limited, prompting our examination of the benefic

Clinical TrialHighlighted

The effect of hydrogen‑rich water consumption on premenstrual symptoms and quality of life: a randomized controlled trial

MHID-1852029PMID: 385323732024BMC Women's Health

Menekşe Nazlı Aker, İlknur M. Gönenç, Dilan Çalişici, Menekşe Bulut, Duried Alwazeer, Tyler W. LeBaron

Background  Premenstrual syndrome (PMS) consists of psychiatric or somatic symptoms negatively affecting the daily life. PMS treatment can involve the use of complementary-alternative approaches. Hydrogen-rich water (HRW) has antioxidant and anti-inflammatory properties that may treat PMS. This study aimed to investigate the effect of drinking HRW on the severity of premenstrual symptoms and the q

Clinical Trial

Medium-Term Intake of Dihydrogen and Pyrroloquinoline Quinone Affects Brain Metabolism and Cognition in Elderly With Mild Cognitive Impairment

MHID-14786562024Current Developments in Nutrition

Sonja Baltic, Nikola Todorovic, Marijana Ranisavljev, Dragana Zanini, David Nedeljkovic, Darinka Korovljev, et al.

Objectives: Molecular hydrogen (H2) and pyrroloquinoline quinone (PQQ) have been suggested to activate metabolic pathways associated with cognition. No human studies have assessed the efficacy of this nutritional combination in the clinical context of mild cognitive impairment (MCI). The primary objective of this randomized placebo-controlled trial was to evaluate the effects of a six-week suppleme