How to incorporate hydrogen-rich water into your daily life?
Discover ways to start taking molecular hydrogen.
Keep learningFrequently Asked Questions about Hydrogen Water
Find clear answers to the most common questions about hydrogen-rich water and molecular hydrogen. Discover what it is, how it is generated, what properties are being investigated, how to drink and store it, and what you should consider when choosing a hydrogen bottle or a hydrogen water generator.
We have organized the information by categories so you can easily locate each topic and better understand the science, technology, and daily use of H₂-rich water.
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The Essentials of Hydrogen-Rich Water
What is hydrogenated water?
Hydrogen water is drinking water, H₂O, to which dissolved molecular hydrogen, H₂, is added. Simply put, we can represent it as:
H₂O + dissolved H₂
Hydrogen does not chemically bind to water or create a new molecule; it remains temporarily dissolved, similar to carbon dioxide in sparkling water, but without producing noticeable bubbles.
Hydrogen water retains virtually the same taste, smell, and appearance as regular water, but the presence of hydrogen completely changes the water's properties.
What is the main property of molecular hydrogen?
The most well-known and researched property of molecular hydrogen (H₂) is its selective antioxidant action. This means it preferentially acts against the most reactive and damaging free radicals, such as the hydroxyl radical, without indiscriminately neutralizing other oxidizing molecules that the body uses for essential signaling and defense functions.
Unlike broader-acting antioxidants, H₂ helps balance oxidative stress while respecting normal physiological processes. This selectivity is one of the characteristics that makes molecular hydrogen particularly interesting for scientific research.
Why can molecular hydrogen reach cells so easily?
Molecular hydrogen (H₂) is the smallest and lightest molecule that exists. Thanks to its small size, it can quickly diffuse through cell membranes and reach areas such as the cytoplasm, mitochondria, and nucleus.
This penetrating ability differentiates it from many larger antioxidants, which do not always reach all cellular compartments with the same ease.
How long does it take for molecular hydrogen to diffuse through the body?
Molecular hydrogen begins to be absorbed and distributed throughout the body within minutes. Thanks to its extremely small size, it easily crosses cell membranes and can reach different tissues and cellular compartments.
In studies conducted with hydrogen-rich water, the concentration of exhaled hydrogen reached its peak approximately 10 to 15 minutes after drinking it, demonstrating its rapid absorption and circulation throughout the body.
What does it mean for hydrogenated water to have a negative ORP?
ORP indicates the oxidizing or reducing capacity of a liquid. Tap water usually has a positive ORP, especially when it contains oxidizing agents like chlorine.
During electrolysis, as molecular hydrogen (H₂) is generated and dissolved, the ORP of water can shift to negative values. Simply put, the water gains a greater reducing or antioxidant capacity from an electrochemical perspective.
This change is related to the presence of H₂, which is precisely the molecule being investigated for its possible antioxidant and protective effects against oxidative stress.
Important: A more negative ORP does not necessarily mean there is more hydrogen. To know the actual amount of H₂, it must be measured in PPM or PPB.
Who is hydrogenated water recommended for?
Hydrogen-rich water can be part of the routine of anyone who wants to take care of their well-being and help the body maintain balance against oxidative stress.
It can be especially interesting for people who actively care for their health, athletes and physically active people, adults under stress, seniors, and those looking to support their energy, recovery, metabolism, and healthy aging.
There's no need to wait for a health problem to incorporate it: many people use hydrogen-rich water simply as a way to improve their daily hydration and provide molecular hydrogen to the body.
How is hydrogenated water generated?
Hydrogen water can be produced using different methods. The most common method used in a hydrogen water bottle or portable generator is water electrolysis.
When the device is activated, an electric current passes through electrodes and causes an electrochemical reaction. In systems with SPE/PEM technology, a proton exchange membrane helps to keep the hydrogen and oxygen generated during the process separate. Molecular hydrogen, H₂, is incorporated and temporarily remains dissolved in the water, while oxygen is evacuated through a separate path.
The result can be simply represented as:
H₂O + dissolved H₂
A hydrogen water generator bottle does not store hydrogen inside; it generates it instantly through electrolysis and allows you to prepare H₂-rich water in just a few minutes.
There are also other ways to produce hydrogen water, such as hydrogen tablets, which release H₂ through a chemical reaction—usually related to magnesium—or systems that introduce gaseous hydrogen into the water under pressure.
Does adding molecular hydrogen change the taste of water?
No. Hydrogenated water maintains the same neutral and refreshing taste as regular water. Some people notice that it tastes softer or lighter, but the flavor doesn't change significantly.
How long does hydrogen last in water?
Molecular hydrogen is a light and volatile gas, so it begins to dissipate quickly once generated. It can be stored longer in a tightly sealed container, but to maintain the highest possible concentration of H₂, it is recommended to drink the water immediately after preparation.
How much hydrogen-rich water is recommended to drink per day?
According to the most recent scientific studies, the minimum effective daily dose of molecular hydrogen is approximately between 1 and 3 mg per day .
A single glass of hydrogenated water generated with UVEPEM provides 1.1 mg of hydrogen , according to its certification, so one glass is already enough to reach the minimum recommended dose .
However, taking more can provide additional benefits , since molecular hydrogen does not accumulate in the body and the excess is eliminated naturally.
To put it in context, one UVEPEM glass , thanks to its high hydrogen concentration, is equivalent to approximately 4–5 glasses from other conventional systems on the market .
When will I notice the results of hydrogenated water?
Molecular hydrogen begins to be absorbed and diffused throughout the body within minutes, but the time it takes for its effects to be perceived depends on each person and the desired objective.
Some people notice more energy, less fatigue, or improved recovery within the first few days. In exercise studies, changes have been observed after a single session or after 8 days of consumption, while effects related to general well-being and metabolism are usually evaluated after 2 to 8 weeks of daily use.
To assess its results, the most important things are consistency and drinking the freshly generated water to maintain the highest possible concentration of H₂.
What is Kangen water, and how does it differ from hydrogenated water?
Kangen Water® is the trade name used by Enagic for water produced by its alkaline ionizers. These devices filter tap water and subject it to electrolysis, separating it into an alkaline and an acidic stream. Dissolved molecular hydrogen can also be generated during the process.
The main difference lies in the approach: Kangen systems are presented primarily as alkaline water ionizers, while a hydrogen bottle is specifically designed to generate and concentrate dissolved H₂, without significantly increasing the pH.
In summary, Kangen water can be alkaline and contain hydrogen, but “alkaline water,” “Kangen water,” and “hydrogenated water” are not exactly the same. To compare systems, it is advisable to check the certified H₂ concentration, the technology used, and the quality of the materials.
How does molecular hydrogen differ from other antioxidants like vitamin C or coenzyme Q10?
Vitamin C, coenzyme Q10, and molecular hydrogen help the body protect itself against oxidative stress, but they act differently.
Molecular hydrogen stands out for being the smallest and lightest molecule that exists, which allows it to diffuse quickly and cross cell membranes, even reaching compartments such as mitochondria and the nucleus.
In addition, it is characterized by its selective antioxidant action: it acts preferentially against the most reactive and harmful oxidizing species, without indiscriminately neutralizing other molecules that the body needs for signaling and cellular defense.
Other antioxidants, such as vitamin C or coenzyme Q10, also perform essential functions but have different mechanisms, sizes, and areas of action. Therefore, hydrogenated water does not replace them but can complement the body's natural antioxidant defenses.
Is drinking hydrogenated water safe?
Yes. Hydrogen-rich water is considered completely safe for daily consumption. No adverse effects associated with its consumption have been observed in studies conducted to date.
Molecular hydrogen is a natural gas that is also produced in our bodies. It does not accumulate: unused H₂ is quickly eliminated, mainly through breathing.
Precisely this combination of good tolerability and antioxidant potential is one of the reasons why molecular hydrogen has generated so much scientific interest.
Can I use any type of water?
For best results, use filtered, low-mineral bottled, or purified water. Using water with high mineral content can negatively impact hydrogen generation efficiency.
At what level of hydrogen is it considered effective?
Several studies cite a range of 1.0–1.6 PPM as a reference for hydrogen-rich water. UVEPEM, thanks to its advanced technology, achieves up to 6.61 PPM , measured and verified by an independent laboratory. This means that a single glass can provide a significant dose of molecular hydrogen.
Are hydrogenated water and alkaline water the same?
No. Hydrogen water contains dissolved molecular hydrogen (H₂), while alkaline water is primarily characterized by having a pH greater than 7.
Some alkaline waters obtained through electrolysis may also contain molecular hydrogen, but not all of them reach a significant concentration of H₂. Similarly, hydrogen water can maintain a virtually neutral pH.
Therefore, when evaluating a hydrogen water generator, what matters is not only the pH or ORP, but the actual concentration of dissolved molecular hydrogen, expressed in PPM or PPB.
Can babies, pregnant women, and the elderly drink hydrogen-rich water?
Yes. There are no known contraindications to drinking hydrogen-rich water in these groups. It's always advisable to maintain a balanced diet and consult a healthcare professional if you have specific medical conditions, but to date there is no evidence of adverse effects.
Benefits of hydrogen water
Can hydrogenated water reduce muscle soreness and DOMS?
Hydrogen-rich water can promote muscle recovery after exercise. Reduced muscle soreness, a decrease in lactate response, and better preservation of muscle function have been observed after intense workouts.
Therefore, it can be particularly interesting for athletes and active individuals seeking better recovery and greater muscle comfort.
Can hydrogen water improve skin and reduce wrinkles?
Molecular hydrogen can contribute to skin care by helping to reduce oxidative stress, one of the factors related to collagen degradation and skin aging.
Research with hydrogen-rich water has shown improvements in the appearance of wrinkles and various skin parameters. H₂ has also been linked to increased production of type I collagen, which is essential for maintaining firmness, elasticity, and a smoother appearance.
Its antioxidant action and ability to diffuse rapidly can help protect skin cells and promote a firmer, brighter, and healthier appearance.
Can it contribute to healthy aging?
Molecular hydrogen is being investigated for its relationship to some of the processes involved in aging, such as oxidative stress, inflammation, mitochondrial function, and cellular deterioration.
Its prolonged consumption has been linked to favorable changes in certain markers of aging, physical function, brain metabolism, and quality of life.
Can it help with more energy and less fatigue?
Many people associate the regular consumption of hydrogen water with an increased sense of energy, mental clarity, and reduced fatigue.
H₂ does not act as a stimulant, like caffeine. Its appeal lies in its potential support for cellular function, recovery, and balance against oxidative stress, which can translate into a better sense of well-being and daily performance.
Can it help reduce inflammation?
Molecular hydrogen helps to modulate processes related to oxidative stress and inflammatory response. Research conducted in people has shown favorable changes in different markers of inflammation and cellular protection.
This action is related to its ability to promote cellular balance without blocking the body's natural defense mechanisms.
Can hydrogenated water help reduce stress and anxiety?
Hydrogenated water can help improve the body's response to daily stress. In a study with healthy adults, its consumption for four weeks was linked to improved mood and anxiety, along with reduced activity of the sympathetic nervous system, associated with alertness and tension.
Its antioxidant and anti-inflammatory action can promote greater balance in the nervous system, helping you feel calmer, with less mental fatigue and a better overall sense of well-being.
How does molecular hydrogen help reduce oxidative stress?
Oxidative stress occurs when the body produces more free radicals than it can neutralize, which can damage cells and promote inflammation, fatigue, and cellular aging.
Molecular hydrogen acts as a selective antioxidant, helping to neutralize the most reactive and harmful free radicals without interfering with the oxidizing molecules that the body needs for its normal functions.
This ability to promote cellular balance is one of the main reasons why hydrogen-rich water is being researched in areas such as muscle recovery, metabolism, brain function, and healthy aging.
Can hydrogenated water help joints and improve mobility?
Molecular hydrogen is being investigated for its ability to help reduce oxidative stress and modulate inflammation, two processes related to wear and tear and joint discomfort.
Its regular consumption can contribute to joint care, promote more comfortable mobility, and support recovery after physical activity. Positive results have also been observed in markers of joint activity and well-being in people with inflammatory conditions.
Can hydrogen water help me lose weight?
Hydrogenated water can be an ally for improving metabolism and supporting weight control. In people with metabolic disorders, improvements have been observed in body composition, body mass index, abdominal fat, and some appetite-related mechanisms.
It does not act as a weight loss product on its own, but it can complement a balanced diet and an active lifestyle.
Can hydrogen water help improve metabolism?
Yes. Molecular hydrogen is being researched for its ability to support metabolic balance. Its consumption has been linked to improvements in parameters such as glucose, glycated hemoglobin, cholesterol, and certain inflammatory markers.
For this reason, hydrogen-enriched water may be particularly interesting for people who want to take care of their metabolism and maintain better energy balance.
Does hydrogen water help improve memory and mental clarity?
There is promising evidence regarding the role of molecular hydrogen in protecting the brain from oxidative stress and inflammation. Improvements have been observed in tests related to attention, processing speed, and cognitive function.
Thanks to its small size, H₂ can easily cross cell membranes and reach brain tissue, where it is being investigated for its potential neuroprotective effect.
Does it help reduce lactate during exercise?
Yes. The consumption of hydrogen-rich water has been shown to reduce lactate response during and after exercise.
Lower lactate accumulation can contribute to reducing the sensation of muscle fatigue and promoting more comfortable recovery after intense exercise.
Molecular Hydrogen and Health Research
What is known about hydrogenated water and type 2 diabetes?
Molecular hydrogen is being studied for its possible role in glucose and fat metabolism. In research with people with type 2 diabetes or impaired glucose tolerance, improvements have been observed in some markers related to oxidative stress, cholesterol, and metabolism.
These results have sparked interest in hydrogen-rich water as a supplement to support metabolic health, always in conjunction with habits and treatments indicated for diabetes.
Can hydrogen water benefit cardiovascular health?
One of the most interesting areas of research is endothelial function, that is, the ability of blood vessels to dilate and function correctly.
In human trials, the consumption of hydrogen-rich water has shown improvements in blood vessel function and in some parameters related to cholesterol and oxidative stress, which are important factors for cardiovascular health.
What is being researched about molecular hydrogen and Alzheimer's?
The brain is particularly susceptible to oxidative stress and inflammation, two processes involved in neurodegenerative diseases. Due to its ability to rapidly diffuse through tissues, molecular hydrogen is being investigated for its potential neuroprotective effects.
In experimental models of Alzheimer's disease, promising results have been observed regarding memory, neuronal protection, and cognitive decline. Research in humans is still limited, so we are currently talking about a promising line of research, not an established treatment.
What is known about hydrogenated water and fatty liver?
Molecular hydrogen is also being investigated in people with non-alcoholic fatty liver disease, a condition closely related to metabolism, oxidative stress, and inflammation.
In a clinical trial, the consumption of hydrogen-rich water for 28 days was associated with a reduction in fat accumulation in the liver as measured by MRI. Other studies in humans have observed favorable trends in lipid profiles and various metabolic markers.
These results have made molecular hydrogen an interesting line of research for supporting liver and metabolic health.
Is molecular hydrogen being researched for arthritis and inflammatory diseases?
Yes. Molecular hydrogen is also being studied in diseases characterized by inflammation and oxidative stress, including rheumatoid arthritis and other musculoskeletal disorders.
Favorable changes in some inflammatory markers, symptoms, and physical function have been observed in clinical studies, which has prompted further research into H₂ as a complementary support for joint health.
Can molecular hydrogen help reduce chemotherapy side effects?
Molecular hydrogen is being investigated as a supportive agent during certain cancer treatments due to its ability to help protect healthy tissues from oxidative stress.
In a clinical trial involving colorectal cancer patients treated with mFOLFOX6 chemotherapy, the consumption of hydrogen-rich water was associated with reduced alteration of liver function markers, suggesting a possible protective effect against chemotherapy-induced liver damage.
There are also studies using other methods of H₂ administration that have observed improvements in symptoms and quality of life during cancer treatments. For this reason, it is currently being studied as a complementary therapy, not as a substitute for cancer treatment.
During chemotherapy, any supplement should be discussed with the oncologist beforehand, as different treatments act through different mechanisms, and there is not yet sufficient evidence to generally recommend H₂ to all patients.
What other diseases is molecular hydrogen being studied for?
Research on H₂ has expanded to numerous areas: metabolic, neurological, cardiovascular, inflammatory, and musculoskeletal diseases, among others. Results vary depending on the disease and study type, but the growing number of investigations explains why molecular hydrogen is generating so much scientific and clinical interest.
Technology: how to choose a hydrogen water bottle
Why are some hydrogen bottles €30 and others cost several hundred?
Because not all bottles use the same technology or materials. In a hydrogen water generator, the quality of the electrodes, the PEM membrane, the gas separation system, and the materials in contact with the water is especially important.
A low-quality or poorly designed device may not only generate very little hydrogen: inadequate electrodes can degrade and release metals into the water, and poorly controlled electrolysis can favor the formation of unwanted byproducts. For this reason, in this type of product, manufacturing quality is also a safety issue.
A more expensive bottle is not automatically better, but it is worth checking that it uses corrosion-resistant materials, SPE/PEM technology, proper gas evacuation, and independent measurements of H₂ concentration.
In other words: a good bottle must demonstrate not only how much hydrogen it produces, but also how it produces it.
Are all hydrogen cylinders the same?
Not all hydrogen water bottles generate the same type of hydrogen water. The actual H₂ concentration, electrolysis technology, electrode quality, PEM membrane, materials, and independent testing can make big differences between one generator and another.
These are the most important features to check before choosing a hydrogen water bottle.
What should I look for when buying a hydrogen bottle?
Before choosing a generator, primarily check the H₂ concentration, SPE/PEM technology, electrode materials, membrane quality, gas evacuation system, and the existence of independent measurements.
Also important are the quality of materials in contact with water, ease of cleaning, battery life, and warranty.
Why is independent certification important?
Because it allows verifying that the concentration advertised by the manufacturer has actually been obtained in an external measurement and under specific conditions.
Before buying a bottle of hydrogen, it is advisable to check whether the brand shows laboratory results, the measurement method, and the concentration of H₂ achieved, rather than just stating figures without documentation.
Do all hydrogen bottles produce the same amount of hydrogen?
No. The concentration of molecular hydrogen can vary enormously between devices. Some bottles generate relatively low concentrations, while more advanced equipment can reach several PPM of dissolved H₂.
Therefore, rather than focusing solely on visible bubbles, it is important to know the actual hydrogen concentration obtained, and preferably, that it has been verified through an independent measurement.
Do a lot of bubbles mean more hydrogen?
Not necessarily. Seeing many bubbles doesn't tell you how much H₂ has actually dissolved in the water. Some of the gas can escape without dissolving.
The correct way to determine a bottle's performance is to measure the concentration of dissolved molecular hydrogen, expressed in PPM or PPB
What is the function of the PEM membrane?
The PEM membrane allows protons to pass through while keeping the gases produced during electrolysis separate. Thanks to this separation, hydrogen can be incorporated into the water while other gases are evacuated through another route.
The quality of this membrane is an important part of the performance and stability of a hydrogen water generator.
What do PPM and PPB mean in hydrogenated water?
PPM and PPB indicate the amount of molecular hydrogen dissolved in water. 1 PPM is equivalent to 1 mg of H₂ per liter of water, while 1 PPM is equivalent to 1,000 PPB.
The higher the concentration, the more molecular hydrogen the water contains at the time of measurement.
What is SPE/PEM technology and why is it important?
SPE/PEM technology uses electrolysis together with a proton exchange membrane to separate hydrogen from oxygen and other byproducts generated during the process.
This allows for the production of water primarily enriched with molecular hydrogen (H₂), preventing the gases produced during electrolysis from remaining mixed in the water.
Why are the electrodes of a hydrogen bottle important?
Electrodes are one of the fundamental parts of the generator. Their material, coating, and quality influence both the efficiency of electrolysis and the durability of the device.
In quality generators, platinum-coated titanium electrodes are commonly used, materials that are corrosion-resistant and suitable for this type of technology.