Human Studies

Breathing hydrogen-oxygen mixture decreases inspiratory effort

In Cardiovascular, Human studies by CHESS 

Hydrogen-oxygen mixture (H2-O2) may reduce airway resistance in patients with acute severe tracheal stenosis, yet data supporting the clinical use of H2-O2 are insufficient. The authors evaluated the efficacy and safety of breathing H2-O2 in acute severe tracheal stenosis. Thirty-five consecutive patients with severe acute tracheal stenosis were recruited in this prospective self-control study. Air, H2-O2 and O2 inhalation was …Read More



Inhalation of hydrogen in Parkinson’s disease

In Human studies, Nervous system by CHESS 

Hyposmia is one of the earliest and the most common symptoms in Parkinson’s disease (PD). The benefits of hydrogen water on motor deficits have been reported in animal PD models and PD patients, but the effects of hydrogen gas on PD patients have not been studied. The authors evaluated the effect of inhalation of hydrogen gas on olfactory function, non-motor …Read More



Hydrogen-controlled cancer

In Cancer, Human studies by CHESS 

Advanced cancer treatment is a huge challenge and new ideas and strategies are required. Hydrogen exerts antioxidant and anti-inflammatory effects that may be exploited to control cancer, the occurrence and progression of which is closely related to peroxidation and inflammation. The authors conducted a prospective follow-up study of 82 patients with stage III and IV cancer treated with hydrogen inhalation …Read More



Hydrogen-rich water affects antioxidant activity and gut flora in soccer players

In Exercise, Human studies by CHESS 

Expending a considerable amount of physical energy inevitably leads to fatigue during both training and competition in football. An increasing number of experimental findings have confirmed the relationship between the generation and clearance of free radicals, fatigue, and exercise injury. Recently, hydrogen was identified as a new selective antioxidant with potential beneficial applications in sports. The present study evaluated the …Read More



Hydrogen gas inhalation after myocardial infarction

In Cardiovascular, Human studies by CHESS 

Hydrogen gas inhalation (HI) reduced infarct size and mitigated adverse left ventricular (LV) remodeling in a rat model of acute myocardial infarction (AMI). The authors designed a prospective, open-label, rater-blinded clinical pilot study in patients experiencing ST-elevated MI (STEMI). The 20 patients with an initial diagnosis of STEMI were assigned to either an HI group (1.3% H2with 26% oxygen) or …Read More



Efficacy of inhaled hydrogen on neurological outcomes following brain ischemia during post-cardiac arrest

In Human studies, Nervous system by CHESS 

Hydrogen gas inhalation (HI) improved survival and neurological outcomes in an animal model of post-cardiac arrest syndrome (PCAS). The feasibility and safety of HI for patients with PCAS was confirmed in a pilot study. The objective of this study is to evaluate the efficacy of HI for patients with PCAS. The efficacy of inhaled Hydrogen on neurological outcome following Brain …Read More



Hydrogen gas inhalation in acute cerebral infarction

In Human studies, Nervous system by CHESS 

Molecular hydrogen (H2) acts as a therapeutic antioxidant. Inhalation of H2 gas (1-4%) was effective for the improvement of cerebral infarction in multiple animal experiments. Thus, for actual applications, a randomized controlled clinical study is desired to evaluate the effects of inhalation of H2 gas. Here, the authors evaluate the H2 treatment on acute cerebral infarction. Through this randomized controlled …Read More



Effects of hydrogen rich water on prolonged intermittent exercise

In Exercise, Human studies by CHESS 

Recent studies showed a positive effect of Hydrogen Rich Water (HRW) intake on acid-basic homeostasis at rest. The authors investigated 2-weeks of HRW intake on repeated sprint performance and acid-base status during prolonged intermittent cycling exercise. In a cross over single-blind protocol, eight trained male cyclists (age [mean ± SD] 41±7 years, body mass 72.3±4.4 kg, height 1.77±0.04 m, maximal …Read More



Hydrogen-rich water positively affects exercise capacity in mid-age overweight women

In Exercise, Human studies by CHESS 

Molecular hydrogen (H2) improves body composition, metabolic profiles and mitochondrial function in overweight women, yet no studies so far evaluated the effectiveness of H2 for improving exercise capacity in this population. The authors examined the effects of 28-days supplementation with 1 L per day of hydrogen-rich water (HRW) on exercise capacity and quality of life in overweight mid-age women. Twelve …Read More



Protective effect of hydrogen-rich water on liver function of colorectal cancer patients treated with chemotherapy

In Cancer, Human studies by CHESS 

The present study was conducted to investigate the protective effect of hydrogen-rich water on the liver function of colorectal cancer (CRC) patients treated with mFOLFOX6 chemotherapy. A controlled, randomized, single-blind clinical trial was designed. A total of 152 patients with CRC were recruited by the Department of Oncology of Taishan Hospital (Taian, China) between June 2010 and February 2016, among …Read More


Hydrogen-rich water for improvements of mood, anxiety, and autonomic nerve function in daily life

In Human studies, Nervous system by CHESS 

Health and a vibrant life are sought by everyone. To improve quality of life (QOL), maintain a healthy state, and prevent various diseases, evaluations of the effects of potentially QOL-increasing factors are important. Chronic oxidative stress and inflammation cause deteriorations in central nervous system function, leading to low QOL. In healthy individuals, aging, job stress, and cognitive load over several …Read More



Molecular hydrogen positively affected post-exercise recovery

In Exercise, Human studies by CHESS 

Molecular hydrogen (H2) recently appeared as a novel and safe ergogenic agent that might have beneficial effects in athletes. However, no information is available concerning the impact of H2 on post-exercise recovery indices. The purpose of this study was to determine the effects of pre-exercise H2 administration on post-exercise heart rate and blood lactate responses in judo athletes. Five athletes …Read More



Hydrogen gas for post-cardiac arrest syndrome

In Cardiovascular, Human studies by CHESS 

Hydrogen gas inhalation (HI) ameliorates cerebral and cardiac dysfunction in animal models of post-cardiac arrest syndrome (PCAS). HI for human patients with PCAS has never been studied. Between January 2014 and January 2015, 21 of 107 patients with out-of-hospital cardiac arrest achieved spontaneous return of circulation. After excluding 16 patients with specific criteria, 5 patients underwent HI together with target …Read More



Improvement of psoriasis-associated arthritis by treatment with molecular hydrogen

In Human studies, Inflammation, Skin by CHESS 

Psoriasis, a chronic inflammatory skin disease, is caused by infiltrating lymphocytes and associated cytokines, including tumor necrosis factor (TNF)α, interleukin (IL)-6, and IL-17. Effective treatments, including pathogenesis-based biological agents against psoriasis, are currently under development. Although the role of reactive oxygen species (ROS) in the pathogenesis of psoriasis has been investigated, it remains to be fully elucidated; ROS-targeted therapeutic strategies …Read More



Effectiveness of oral and topical hydrogen for sports-related soft tissue injuries

In Human studies, Muscle by CHESS 

Because hydrogen therapy has been found beneficial for the treatment of inflammation, ischemia-reperfusion injury, and oxidative stress in humans, it seems useful to evaluate the effects of exogenously administered hydrogen as an element in the immediate management of sports-related soft tissue injuries. The main aim of this pilot study was to examine the effects of 2-week administration of hydrogen on …Read More



Hydrogen water intake via tube-feeding for patients with pressure ulcer

In Human studies, Skin by CHESS 

Pressure ulcer (PU) is common in immobile elderly patients, and there are some research works to investigate a preventive and curative method, but not to find sufficient effectiveness. The aim of this study is to clarify the clinical effectiveness on wound healing in patients with PU by hydrogen-dissolved water (HW) intake via tube-feeding (TF). Furthermore, normal human dermal fibroblasts OUMS-36 …Read More



Breath hydrogen produced by ingestion of commercial hydrogen water

In Human studies, Metabolism by CHESS 

This study compared how and to what extent ingestion of hydrogen water and milk increase breath hydrogen in adults. Five subjects without specific diseases, ingested distilled or hydrogen water and milk as a reference material that could increase breath hydrogen. Their end-alveolar breath hydrogen was measured. Ingestion of hydrogen water rapidly increased breath hydrogen to the maximal level of approximately …Read More



Hydrogen-rich water improved liver function in patients with chronic hepatitis B

In Human studies, Inflammation by CHESS 

This study investigated effects of hydrogen-rich water (HRW) on oxidative stress, liver function and HBV DNA in patients with chronic hepatitis B (CHB). Sixty patients with CHB were randomly assigned into routine treatment group or hydrogen treatment group in which patients received routine treatment alone or additional oral HRW (1200-1800 mL/day, twice daily), respectively, for 6 consecutive weeks. Serum oxidative …Read More



Hydrogen-rich water decreases serum LDL-cholesterol levels and improves HDL function

In Metabolism by CHESS 

Authors have found that hydrogen (dihydrogen; H2) has beneficial lipid-lowering effects in high-fat diet-fed Syrian golden hamsters. The objective of this study was to characterize the effects of H2-rich water (0.9-1.0 l/day) on the content, composition, and biological activities of serum lipoproteins on 20 patients with potential metabolic syndrome. Serum analysis showed that consumption of H2-rich water for 10 weeks …Read More



Molecular hydrogen inhalation in acute cerebral ischemia patients

In Human studies, Nervous system by CHESS 

In animal experiments, use of molecular hydrogen (H2) has been regarded as quite safe and effective, showing benefits in multiple pathological conditions such as ischemia-reperfusion injury of the brain, heart, kidney and transplanted tissues, traumatic and surgical injury of the brain and spinal cord, inflammation of intestine and lung , degenerative striatonigral tissue and also in many other situations. However, …Read More



Molecular hydrogen consumption in the human body during the inhalation of hydrogen gas

In Human studies, Metabolism by CHESS 

Inhaling or ingesting hydrogen (H2) gas improves oxidative stress-induced damage in animal models and humans. It has been previously reported that H2 was consumed throughout the human body after the ingestion of H2-rich water and that the H2 consumption rate (VH2) was 1.0 μmol/min/m(2) body surface area. To confirm this result, authors evaluated VH2 during the inhalation of low levels …Read More



Transperitoneal administration of hydrogen suppress peritoneal and systemic oxidative stress

In Human studies, Kidney by CHESS 

Oxidative stress (OS) related to glucose degradation products such as methylglyoxal is reportedly associated with peritoneal deterioration in patients treated with peritoneal dialysis (PD). However, the use of general antioxidant agents is limited due to their harmful effects. This study aimed to clarify the influence of the novel antioxidant molecular hydrogen (H2) on peritoneal OS using albumin redox state as …Read More



Hydrogen-rich water as ergogenic agent

In Exercise, Human studies by CHESS 

Possible appliance of effective and safe alkalizing agent in the treatment of metabolic acidosis could be of particular interest to humans experiencing an increase in plasma acidity, such as exercise-induced acidosis. In the present study authors tested the hypothesis that the daily oral intake of 2L of hydrogen-rich water (HRW) for 14 days would increase arterial blood alkalinity at baseline …Read More



Hydrogen-rich water affected rate of acidosis induced by exercise in young healthy men

In Exercise, Human studies by CHESS 

Metabolic acidosis is a clinical disturbance characterized by low pH in body tissues and blood and a variety of neuromuscular and cardiorespiratory responses. Besides treating the initial disorder, the main goal for patients with acidosis is to increase the systemic pH with alkalizing agents. The main aims of this study were to investigate whether daily oral administration of 2 L …Read More



Hydrogen-rich water and quality of life in cancer patients receiving radiotherapy

In Cancer, Human studies by CHESS 

Cancer patients receiving radiotherapy often experience fatigue and impaired quality of life (QOL). Many side effects of radiotherapy are believed to be associated with increased oxidative stress and inflammation due to the generation of reactive oxygen species during radiotherapy. Hydrogen can be administered as a therapeutic medical gas, has antioxidant properties, and reduces inflammation in tissues. This study examined whether …Read More



Acute brain stem infarct sites treated with edaravone and hydrogen

In Human studies, Nervous system by CHESS 

In acute stage of cerebral infarction, MRI indices (rDWI & rADC) deteriorate during the first 3-7 days after the ictus and then gradually normalize in approximately 10 days (pseudonormalization time), although the tissue is already infarcted. Since effective treatments improve these indices significantly and in less than the natural pseudonormalization time, a combined analysis of these changes provides an opportunity …Read More



Drink with hydrogen improves exercise performance in physically active men and women

In Exercise, Human studies by CHESS 

In the current study we tested the hypothesis that an acute (7 days) intake of an alkaline negative oxidative reduction potential formulation (NORP) drink would reduce the rate of blood lactate accumulation during and after exercise, increase time to exhaustion, increase serum buffering capacity and not increase prevalence of adverse effects as compared to the control drink. Eleven participants (9 …Read More



Effects of drinking hydrogen-rich water on muscle fatigue in elite athletes

In Exercise, Human studies by CHESS 

Muscle contraction during short intervals of intense exercise causes oxidative stress, which can play a role in the development of overtraining symptoms, including increased fatigue, resulting in muscle microinjury or inflammation. Recently it has been said that hydrogen can function as antioxidant, so we investigated the effect of hydrogen-rich water (HW) on oxidative stress and muscle fatigue in response to …Read More



Hydrogen-helium-oxygen mixture in humans during an open sea dive

In Exercise, Human studies by CHESS 

Six commercial divers were investigated for neurological and psychosensorimotor responses during an open sea dive to 500 m with a hydrogen-helium-oxygen mixture containing 49% hydrogen. Results showed only moderate neurological symptoms of high-pressure nervous syndrome, whereas the narcotic effect of hydrogen was detectable, as investigated by psychosensorimotor tests. Nevertheless, the divers successfully carried out the main purpose of the operational …Read More


Molecular hydrogen reduces oxidative stress and disease activity in patients with rheumatoid arthritis

In Human studies, Inflammation by CHESS 

Rheumatoid arthritis (RA) is a chronic inflammatory disease characterized by the destruction of bone and cartilage. Although its etiology is unknown, the hydroxyl radical has been suggested to be involved in the pathogenesis of RA. Recently, molecular hydrogen (H2) was demonstrated to be a selective scavenger for the hydroxyl radical. Also, the method to prepare water containing extremely high concentration …Read More


Hydrogen-rich water improves lipid and glucose metabolism in patients with type 2 diabetes

In Human studies, Metabolism by CHESS 

Oxidative stress is recognized widely as being associated with various disorders including diabetes, hypertension, and atherosclerosis. It is well established that hydrogen has a reducing action. We therefore investigated the effects of hydrogen-rich water intake on lipid and glucose metabolism in patients with either type 2 diabetes mellitus (T2DM) or impaired glucose tolerance (IGT). We performed a randomized, double-blind, placebo-controlled, …Read More


Effectiveness of hydrogen rich water in subjects with potential metabolic syndrome

In Human studies, Metabolism by CHESS 

Metabolic syndrome is characterized by cardiometabolic risk factors that include obesity, insulin resistance, hypertension and dyslipidemia. Oxidative stress is known to play a major role in the pathogenesis of metabolic syndrome. The objective of this study was to examine the effectiveness of hydrogen rich water (1.5-2 L/day) in an open label, 8-week study on 20 subjects with potential metabolic syndrome. …Read More


Hydrogen-enriched water for mitochondrial and inflammatory myopathies

In Human studies, Muscle by CHESS 

Molecular hydrogen has prominent effects on more than 30 animal models especially of oxidative stress-mediated diseases and inflammatory diseases. In addition, hydrogen effects on humans have been reported in diabetes mellitus type 2, hemodialysis, metabolic syndrome, radiotherapy for liver cancer, and brain stem infarction. Hydrogen effects are ascribed to specific radical-scavenging activities that eliminate hydroxyl radical and peroxynitrite, and also …Read More


Hydrogen-rich water in patients with interstitial cystitis and painful bladder syndrome

In Human studies, Kidney by CHESS 

The objective of this study was to investigate the efficacy of hydrogen-rich water for the treatment of patients with interstitial cystitis/painful bladder syndrome (IC/PBS). Authors conducted a prospective, randomized, double-blind, placebo-controlled clinical trial of hydrogen-rich water in patients with IC/PBS. Inclusion criteria were stable symptoms of IC/PBS for ≥ 12 weeks after bladder hydrodistension, Interstitial Cystitis Symptom Index score of …Read More


Adding molecular hydrogen to haemodialysis solutions ameliorated inflammatory reactions

In Human studies, Kidney by CHESS 

Chronic inflammation in haemodialysis (HD) patients indicates a poor prognosis. However, therapeutic approaches are limited. Hydrogen gas (H(2)) ameliorates oxidative and inflammatory injuries to organs in animal models. We developed an HD system using a dialysis solution with high levels of dissolved H(2) and examined the clinical effects. Dialysis solution with H(2) (average of 48 ppb) was produced by mixing …Read More


Molecular hydrogen therapy in Parkinson’s disease: a pilot study

In Human studies, Nervous system by CHESS 

Oxidative stress is involved in the progression of Parkinson’s disease (PD). Recent studies have confirmed that molecular hydrogen (H₂) functions as a highly effective antioxidant in cultured cells and animal models. Drinking H₂-dissolved water (H₂-water) reduced oxidative stress and improved Parkinson’s features in model animals. In this a placebo-controlled, randomized, double-blind, parallel-group clinical pilot study, the authors assessed the efficacy …Read More