Introduction to the Scientific Study of
Hydrogen Rich Water and Dietary Supplements
The purpose of this website is to provide easy, understandable access to recent scientific developments related to hydrogen rich water and dietary supplements. Since journal articles in scientific and medical publications are usually written in technical language that can be difficult to understand, we provide short, easy-to-understand descriptions of each study along with a link to download the actual, original article.
Below you will find descriptions and links for articles related in general to hydrogen rich water. For articles related to the brain and nervous system, metabolism and diabetes, kidneys, or other body systems, please click on the page links on the right side of this page.
Hydrogen acts as a therapeutic antioxidant by selectively reducing cytotoxic oxygen radicals
This was the breakthrough paper that first introduced the antioxidant potential of molecular hydrogen to the scientific community. The “oxygen radicals” referred to in the title are free radicals or reactive oxygen species (ROS). Not all oxygen radicals are “cytotoxic” (harmful to cells.) While the strongest oxidants, hydroxyl radicals are dangerous, other ROS must be left alone to do their work in the body. This study shows how hydrogen protects cells by neutralizing hydroxyl radicals, while leaving other ROS alone to fulfill their necessary physiological roles.
Hydrogen has another advantage over other antioxidants because it is such a tiny molecule: it is able to penetrate cell membranes, and can easily enter deep into cell components, such as mitochondria and the nucleus, where other antioxidants are not able to reach.
Download this article from Nature Medicine (Ohsawa et al 2007)
Hydrogen Medicine Therapy: An Effective and Promising Novel Treatment for Multiple Organ Dysfunction Syndrome (MODS) Induced by Influenza and Other Viral Infections Disease
This article goes into detail about what damage in done during pandemic type viral infections. Further that the majority of viral -induced tissue damage and discomfort are mainly caused by an inflammatory cytokine storm and oxidative stress rather than by virus itself . That suppressing the cytokine storm and reducing oxidative stress can significantly alleviate the symptoms of influenza and other severe viral infections diseases. It then relates research on how hydrogen can act to protect the body from damage and that hydrogen-rich solution therapy may be a safe, reliable, and effective treatment for Multiple Organ Dysfunction Syndrome (MODS) induced by influenza and other viral infectious diseases. Download this article from SOJ Microbiology & Infectious Diseases (2017)
Molecular Hydrogen as an Emerging Therapeutic Medical Gas for Neurodegenerative and Other Diseases
The effects of molecular hydrogen on various diseases have been documented for 63 disease models and human diseases (at the time this article was written.) Most studies have been performed on rats and mice, however the lack of any adverse effects of hydrogen have enabled clinical studies in humans even in the absence of animal studies. Important effects of hydrogen are observed especially in diseases caused by oxidative stress including
- Neonatal cerebral hypoxia (reduced supply of oxygen to the brain at birth)
- Parkinson’s disease
- Ischemia/reperfusion of spinal cord, heart, lung, liver, kidney, and intestine (ischemia is the restriction of blood supply to tissue, reperfusion is the damage caused when blood supply returns to the tissue after a period of ischemia)
- Transplantation of lung, heart, kidney, and intestine
Six human diseases have been studied to date:
- Diabetes mellitus type 2
- Metabolic syndrome
- Hemodialysis (treatment for kidney disease)
- Inflammatory and mitochondrial myopathies (muscle disease)
- Brain stem infarction (stroke of the brain stem)
- Radiation-induced adverse effects (due to radiation therapy for tumors)
Two enigmas remain to be solved. First no dose-response effect is observed. Rodents and humans are able to take a small amount of hydrogen by drinking hydrogen-rich water, but marked effects are observed. Second, intestinal bacteria in humans and rodents produce a large amount of hydrogen, but an addition of a small amount of hydrogen exhibits marked effects. Further studies are required to explain the molecular mechanisms of hydrogen effects and to determine the optimal frequency, amount, and method of hydrogen administration for each human disease.
Download this article from Oxidative Medicine and Cellular Longevity (Ohno et al 2012)
Recent Progress Toward Hydrogen Medicine: Potential of Molecular Hydrogen for Preventive and Therapeutic Applications
Persistent oxidative stress is one of the major causes of most lifestyle-related diseases, cancer and the aging process. Acute oxidative stress directly causes serious damage to tissues. Despite the clinical importance of oxidative damage, antioxidants have been of limited therapeutic success. Molecular hydrogen has potential as a novel antioxidant in preventative and therapeutic applications. Hydrogen has a number of advantages as a potential antioxidant: it rapidly diffuses into tissues and cells, and it is mild enough neither to disturb metabolic redox reactions nor to affect reactive oxygen species (ROS) that function in cell signaling, thereby, there should be little adverse effects of consuming hydrogen. Hydrogen shows not only effects against oxidative stress, but also various anti-inflammatory and anti-allergic effects.
Download this article from Current Pharmaceutical Design (Ohta 2011)
Recent advances in hydrogen research as a therapeutic medical gas
Recent research has revealed that hydrogen is an important factor in the regulation of physiology. It has protective effects on cells and organs including antioxidant, anti-inflammatory, and anti-apoptotic (protective against cell death) effects. Therapeutic hydrogen has been applied by different delivery methods including straight-forward inhalation, drinking hydrogen dissolved in water, and injection with hydrogen saturated saline. This review summarizes currently available data regarding the protective role of hydrogen, provides an outline of recent advances in research on the use of hydrogen as a therapeutic medical gas in diverse models of disease and discusses the feasibility of hydrogen as a therapeutic strategy. It is not an overstatement to say that hydrogen’s impact on therapeutic and preventive medicine could be enormous in the future.
Download this article from Free Radical Research (Huang et al 2010)
Hydrogen as a Selective Antioxidant: a Review of Clinical and Experimental Studies
Oxidative stress is implicated in the development of many diseases; however, currently used antioxidants have high toxicity. This means they can only be taken in small amounts which limits their therapeutic effectiveness. There is a clear need for more effective and safer antioxidants. Recently, many studies have reported that molecular hydrogen (inhaled or taken as hydrogen-rich water) can exert beneficial effects in animal models of human diseases. Promising results have also been obtained in clinical studies with humans. These studies suggest that hydrogen has selective antioxidant properties, and can also protect against inflammation, allergies and cell death. This review summaries recent research findings and mechanisms concerning the therapeutic potential of hydrogen.
Download this article from The Journal of International Medical Research (Hong et al 2010)
A hypothesis on chemical mechanism of the effect of hydrogen
Many studies have shown that hydrogen can an play important role in antioxidant, anti-inflammatory and other protective effects. It has been shown that hydrogen can selectively scavenge hydroxyl radicals, however the mechanisms of other recent experimental results have not been explained. This article presents the hypothesis that hydrogen may act as a ligand by binding to metal ions in some proteins, thus regulating the metabolism of ROS and signal transduction. It’s important to note that no study was done to test this hypothesis. The article merely presents the possible mechanism and suggests further study.
Download this article from Medical Gas Research (Shi et al 2012)
The 2011 Medical Molecular Hydrogen Symposium: An inaugural symposium of the journal Medical Gas Research
Meetings were held in Japan in 2009, 2010, and 2011 to provide the opportunity for scientists and doctors researching the medical uses of molecular hydrogen to share their rapid scientific progress. At the 2011 symposium, a new peer-reviewed journal was launched, Medical Gas Research, to promote and exchange the dissemination of the latest scientific findings in this area. This article lists the topics discussed by speakers at the symposium, as well as the 38 diseases and physiological states for which hydrogen effects are reported.
Download this article from Medical Gas Research (Ohta et al 2011)
Enhanced Removal of Free Radicals by Aqueous Hydrogen Nanobubbles and Their Role in Oxidative Stress
Researchers in this 2022 Environmental Science & Technology paper explored whether nanobubble technology could improve the antioxidant potential of hydrogen water. One of the major limitations of hydrogen water is that hydrogen is difficult to keep dissolved in water because it escapes very easily. The researchers explain that nanobubbles are extremely tiny gas bubbles — smaller than 1 micron — that can remain suspended in water much longer than ordinary bubbles. The study found that hydrogen nanobubble water removed certain reactive oxygen species (ROS) much more effectively than dissolved hydrogen water alone. The researchers specifically looked at hydrogen peroxide (H2O2) and superoxide radicals (O2•−), which are associated with oxidative stress and cellular damage.
Using Tetrahymena thermophila as a biological model organism, the researchers observed that hydrogen nanobubble water not only directly reduced reactive oxygen species, but also appeared to stimulate parts of the body’s natural antioxidant defense system.
The paper reports increased activity of antioxidant enzymes including:
- Glutathione peroxidase (GSH-Px)
- Superoxide dismutase (SOD)
The researchers concluded that hydrogen nanobubbles may improve the antioxidant effects of molecular hydrogen by helping hydrogen remain available in water longer and interact more effectively with reactive oxygen species.
An important point made in the paper is that ordinary dissolved hydrogen alone was unable to remove some of these reactive oxygen species effectively under the same conditions, while hydrogen nanobubbles showed a measurable effect. The authors suggest that nanobubble technology may help expand future medical and environmental applications of hydrogen water by improving hydrogen stability and antioxidant performance. Download this article: https://pubs.acs.org/doi/10.1021/acs.est.2c03707
The Effects of 8-Week Hydrogen-Rich Water Consumption on Appetite, Body Composition, Sleep Quality, and Circulating GLP-1 in Obese Men and Women (HYDRAPPET)
This 2025 randomized, double-blind, placebo-controlled trial examined whether drinking hydrogen-rich water (HRW) for 8 weeks could affect appetite, sleep quality, metabolic markers, and body composition in obese men and women. The study included 35 participants who consumed either 1 liter of HRW containing 15 mg of hydrogen daily or placebo water. Researchers found that HRW significantly reduced food cravings and improved several appetite-related measures compared to the control group. The study also reported improvements in subjective sleep quality and reductions in total cholesterol and LDL cholesterol levels.
One particularly interesting finding was an increase in circulating glucagon-like peptide-1 (GLP-1), a hormone involved in appetite regulation, insulin signaling, and satiety. Researchers suggested that hydrogen may influence pathways involved in energy balance and metabolic regulation. The paper also discusses earlier research showing that molecular hydrogen may:
- regulate oxidative stress
- improve mitochondrial function
- influence gut microbiota
- affect appetite-related neurotransmitter systems
- support metabolic health
Although HRW improved appetite scores and sleep quality, the study did not show major changes in body weight or body composition during the 8-week trial period. No serious adverse effects were reported.
The authors conclude that hydrogen-rich water may serve as a safe dietary strategy for improving appetite regulation, sleep quality, and certain metabolic markers in individuals with obesity, while noting that larger long-term studies are still needed.
Download this article from Medicina (Todorovic et al 2025):
Hydrogen-Enriched Water: Benefits for the Body, Prevention and Reduction of Symptoms of Various Diseases
This 2024 scientific review analyzed 69 published studies examining the health effects, disease applications, safety, and physiological mechanisms of hydrogen-enriched water (HW/HRW). The review concluded that hydrogen-rich water shows broad therapeutic potential across oxidative stress, inflammation, metabolic health, exercise recovery, cardiovascular function, aging, and immune regulation.
Key Findings
Researchers reported evidence suggesting hydrogen-rich water may help:
- reduce oxidative stress and free radical damage,
- lower inflammation,
- improve mitochondrial function,
- support metabolic health,
- enhance exercise recovery,
- improve vascular function,
- reduce fatigue,
- and support healthy aging.
The review emphasized that molecular hydrogen acts as a selective antioxidant capable of reducing harmful reactive oxygen species while preserving beneficial signaling molecules important for normal physiology.
Exercise & Athletic Recovery
The paper summarized multiple studies showing benefits for exercise performance and recovery, including:
- reduced lactic acid accumulation,
- reduced muscle soreness,
- improved endurance,
- reduced fatigue,
- enhanced recovery after resistance training,
- improved sprint performance,
- and support for mitochondrial energy production.
The review specifically referenced studies showing:
- improved endurance in untrained athletes,
- benefits for boat rowers,
- reduced fatigue during sprint competitions,
- and improvements in muscle performance and delayed onset muscle soreness (DOMS).
However, the authors also noted that not every study showed performance improvements, particularly in already highly trained endurance athletes.
Metabolic & Cardiovascular Health
The review highlighted evidence that hydrogen-rich water may:
- lower LDL cholesterol,
- reduce triglycerides,
- improve HDL function,
- lower blood glucose,
- improve insulin sensitivity,
- support metabolic syndrome management,
- and improve vascular endothelial function.
One study cited in the review found:
- a 39% increase in antioxidant superoxide dismutase,
- 43% reduction in oxidative stress markers,
- 13% reduction in total cholesterol,
- and 8% increase in HDL cholesterol after regular HRW consumption.
Inflammation, Pain & Immune Regulation
The review described strong evidence for anti-inflammatory effects through reduction of inflammatory cytokines and oxidative damage. Researchers reported benefits in:
- rheumatoid arthritis,
- inflammatory bowel disease,
- neuropathic pain,
- oxidative stress-related disorders,
- and immune dysregulation.
The paper also discussed emerging evidence that molecular hydrogen may help regulate immune responses and reduce symptoms associated with infections and inflammatory conditions, including COVID-19-related fatigue and recovery issues.
Cancer Support & Chemotherapy Side Effects
The review discussed growing interest in hydrogen therapy as a complementary cancer-support strategy. Reported findings included:
- reduction of chemotherapy side effects,
- reduction in oxidative damage from radiotherapy,
- improved quality of life,
- symptom relief in lung cancer patients,
- and enhanced anti-tumor immune responses.
The authors stressed that hydrogen-rich water is not presented as a standalone cancer cure, but rather as a potentially valuable supportive therapy alongside conventional treatments.
Gut Health & Liver Support
Hydrogen-rich water was associated with:
- improved gut microbiome balance,
- increased beneficial bacterial diversity,
- improved intestinal barrier integrity,
- reduced digestive inflammation,
- support for fatty liver disease,
- and reduced oxidative liver damage.
The review also described studies suggesting HRW may help reduce symptoms of GERD and support gastrointestinal comfort.
Anti-Aging & Skin Health
Researchers summarized evidence suggesting hydrogen-rich water may:
- delay cellular aging,
- improve antioxidant status,
- improve sleep quality,
- support brain metabolism,
- improve skin appearance,
- reduce UV skin damage,
- stimulate type I collagen production,
- and positively influence biological aging markers such as telomere length.
One study cited found improvements in biological aging markers after six months of HRW consumption in adults over age 70.
Safety
The review concluded that hydrogen-rich water appears safe for healthy individuals and is legally approved for use. However, the authors recommended that people with serious medical conditions consult healthcare professionals before regular therapeutic use.
Overall Takeaway
This review presents hydrogen-rich water as a broad-spectrum wellness and therapeutic support technology with growing scientific backing across multiple health domains. The strongest recurring themes throughout the literature were:
- oxidative stress reduction,
- anti-inflammatory activity,
- mitochondrial support,
- exercise recovery,
- metabolic regulation,
- and cellular protection.
The paper also highlights an important trend in hydrogen research: while individual studies vary in strength and outcomes, the consistency of benefits across many unrelated disease models suggests molecular hydrogen may work through foundational cellular mechanisms rather than targeting only one condition.