Tyler W. LeBaron, PhD

Research scientist, Executive Director of the science-based nonprofit Molecular Hydrogen Institute. Exercise enthusiast. Live, Love and Learn.

[Tyler W. LeBaron, PhD @TylerWLeBaron]

@Fowler_Fitness1 @the_no_mind Yes, not only is there an absence of evidence when it would otherwise be expected, a number of the claims contradict high school chemistry.

[Tyler W. LeBaron, PhD @TylerWLeBaron]

https://t.co/mNObWEzaEE

[Tyler W. LeBaron, PhD @TylerWLeBaron]

This post contains several fundamental errors in isotope chemistry and mitochondrial bioenergetics. For example:

1) An HD or D2 molecule does not become D+ merely because it diffuses into a mitochondrion. Potential deuterium isotope effects arise when D is incorporated into water, biomolecular bonds, or proton-transfer reactions. NOT from the mere presence of trace HD gas.

2) Electrolysis does not simply transfer the source water’s D/H ratio into the hydrogen gas. Due to the kinetic isotope effect, electrolysis strongly fractionates hydrogen isotopes. Protium is preferentially evolved as gas, while deuterium is enriched in the residual water.

3) The H2, HD, and D2 content can also be directly measured by mass spectrometry. It is therefore incorrect to say that it “cannot be verified.”

4) Molecular hydrogen is NOT an established mitochondrial fuel. It does NOT bypass glycolysis and the TCA cycle to supply electrons to the respiratory chain. Human mitochondria have no demonstrated H2-oxidizing hydrogenase that uses H2 like a bacterium or fuel cell.

5) The statement that H2 rapidly reacts with O2 in plasma and “soaks up” mitochondrial oxygen is chemically incorrect. H2/O2 combustion requires ignition, radical initiation, high temperature, or an appropriate catalyst. Flammability does not mean spontaneous reaction at body temperature, especially when gases are in solution.

6) Retinal melanin splitting water to generate physiologically meaningful H2 is a speculative hypothesis, not established human physiology.

7) The efficacy, dosing, and mechanisms of molecular hydrogen should absolutely be investigated critically. But this particular warning is not supported by quantitative isotope chemistry, electrolysis science, or established mammalian bioenergetics.

Further, if those misleading claims were accurate, then there would not be hundreds of scientific studies in animals and humans suggesting beneficial effects. We would see neutral or harmful effects, but we don't.

[Tyler W. LeBaron, PhD @TylerWLeBaron]

This still misses the central quantitative and biochemical issues.

First, electrolysis does not cause merely a trivial or necessarily “slight” isotope shift. Reported protium/deuterium separation factors are often around 4–7, depending on the electrode, membrane, temperature, and operating conditions. Therefore, hydrogen generated from water at 155 ppm deuterium may contain only a few tens of ppm, not approximately 155 ppm.

But even assuming the absolute worst case of zero fractionation, the quantity is negligible.

One liter of ordinary water at approximately 155 ppm contains about 35 milligrams of deuterium. If that liter also contained 1.6 mg of dissolved H2 with the exact same isotope ratio, the gas would carry only about 0.5 micrograms of deuterium.

That is roughly 70,000 times less deuterium than is already present in the water itself. With a sixfold electrolytic separation factor, the difference would exceed 400,000-fold.

Furthermore, if the H2 is generated from that same water, it has not introduced additional deuterium. It has merely transferred a minute fraction of the water’s existing hydrogen atoms into the gas phase....And again, the gaseous deuterium is NOT the same as deuterium that is incorporated into water and biomolecules, and doesn't have the same effects!

Again, the phrase “this hydrogen bypasses normal metabolic filters” is also unsupported. Molecular H2 is not glucose, a fatty acid, NADH, or a proton moving through intermediary metabolism. Mammalian mitochondria have no demonstrated functional hydrogenase that oxidizes H2 and feeds its hydrogen atoms into the respiratory chain.

H2 therefore does not simply become H+ or D+ and enter ATP synthase. It largely remains a neutral gas, diffuses through the body, and is exhaled...if you want to know the mechanism of H2 in the mitochondria, see the article we published in Redox Biology (https://t.co/nfVzlRasQ3)

[Tyler W. LeBaron, PhD @TylerWLeBaron]

In this section, we briefly cover the ionic mechanisms underlying skeletal muscle fiber repolarization, with particular attention to the roles of potassium and chloride in restoring the resting membrane potential following contractile activity, as well as the broader role of calcium in excitation–contraction coupling. A thorough understanding of these processes is foundational to the study of skeletal muscle physiology and motor function.
I’ll soon be releasing several of my university lectures for those interested in exploring this material in greater depth.
#MusclePhysiology #biology #exercisePhysiology #MedEd #ScienceEducation

[Tyler W. LeBaron, PhD @TylerWLeBaron]

@TomKindlon Thanks for sharing our article

[Tyler W. LeBaron, PhD @TylerWLeBaron]

4:38 full mile!
Technically my first true mile race, previously it was always 1600 m (4 laps). The mile is ~9 meters longer, which adds about 1–2 seconds, so this is officially a PR.
Felt good about it overall, especially given the impromptu opportunity and less-than-ideal splits.
Apparently, well, according to AI haha, this is faster than ~99.99% of the population, which feels pretty good at my age… especially coming off having done so well at the North American Arm Wrestling Championship.

[Tyler W. LeBaron, PhD @TylerWLeBaron]

It was a pleasure competing at the 2026 North American Championship sanctioned by the AUA and produced by BOOM arm wrestling. I did a water cut to make the 150 lbs weight class. Used the exact strategies involving renal physiology that I am currently teaching my advanced exercise physiology students at @suutbirds

Results:
1st – Left Hand (Open Professional Division)
2nd – Right Hand (Open Professional Division)
I ended up placing 1st left and 2nd right in the open professional division. For a bit more practice, I also entered the 190 lbs and 210 lbs amateur divisions and had a few wins. I felt pretty happy considering I just placed 2nd at the tower running championship a few weeks ago. Although endurance and strength training can interfere with each other (AMPK vs mTOR), there are ways around it, and training both will generally benefit most people before any interference. I’ll be making my university lectures available soon for those interested. Thanks again everyone for your support.

[Tyler W. LeBaron, PhD @TylerWLeBaron]

Hydrogen Inhalation and Survival After Cardiac Arrest

This molecule increased survival by 39%, and neurological recovery nearly doubled compared to standard treatment alone. In a multicenter randomized controlled trial conducted across 15 hospitals in Japan, comatose patients following out-of-hospital cardiac arrest of cardiogenic origin received standard care either with or without 2% hydrogen inhalation.

At three months, survival rates were 85% in the hydrogen group compared to 61% in the control group, representing a 39% improvement. Neurological recovery was also higher, with rates of 46% versus 21%, nearly doubling the likelihood of full neurological recovery when 2% hydrogen gas was inhaled.
(PMID: 36969346)

Watch the full interview here: Why Molecular Hydrogen Matters | Dr. Connealy & Dr. Tyler LeBaron | S4 EP13 https://t.co/l2xgrAdRrW

#molecularhydrogen #hydrogeninhalation #clinicalresearch #NeurologicalRecovery #cardiacarrest #wellnessscience #healthinnovation

[Tyler W. LeBaron, PhD @TylerWLeBaron]

Why I Went to Japan to Study Molecular Hydrogen

I went to Japan for this research because that’s where the research started and was occurring. The modern research on molecular hydrogen really began there, including a key article published in Nature Medicine in 2007. Japan is also where the alkaline ionized water industry largely started, and hydrogen water had already been approved for human consumption back in the 1960s.

In 2013, I went to Japan to do research at Nagoya University for an internship because I wanted to study molecular hydrogen directly. While there were a few research groups in other countries , Japan was clearly the epicenter of the most advanced work in this field. At the time, many people in Japan were already using molecular hydrogen in daily life. In fact, a survey conducted before COVID showed that about 50% of the Tokyo population had used molecular hydrogen in some form.

Watch the full interview here: The Truth About Hydrogen Water: Scam or Health Breakthrough? Dr. Tyler LeBaron | Ep. 80
https://t.co/9t5kagMpWa

#MolecularHydrogen #HydrogenResearch #NagoyaUniversity #WellnessScience #HealthInnovation #ScientificResearch

[Tyler W. LeBaron, PhD @TylerWLeBaron]

Why Hydrogen Is the Active Component in Alkaline Ionized Water

You can see in this diagram that hydrogen gas is being produced during electrolysis, which raises an important point: hydrogen gas can be present in alkaline ionized water. Later research demonstrates that when the H2 gas is removed from the alkaline ionized water, the therapeutic benefits are eliminated. This is something we addressed in an article we published a few years ago.

For anyone who wants to explore this more deeply, I recommend reviewing that paper. It’s a comprehensive review of numerous publications on alkaline ionized water, and it shows consistently that when hydrogen gas is removed from alkaline ionized water, the observed benefits in those studies disappear.
(PMID: 36499079, PMID: 3649883)

Watch the full interview here: Why Molecular Hydrogen Matters | Dr. Connealy & Dr. Tyler LeBaron | S4 EP13 https://t.co/l2xgrAdRrW

#MolecularHydrogen #AlkalineIonizedWater #ScientificResearch #WellnessScience #HealthEducation

[Tyler W. LeBaron, PhD @TylerWLeBaron]

Can You Overdose on Molecular Hydrogen?

People often ask whether it’s possible to overdose on hydrogen gas. The short answer is no. Hydrogen gas does not store in tissues. After about 30 to 60 minutes of drinking hydrogen water or stopping hydrogen inhalation, levels return back to baseline.

Once you pass a certain therapeutic threshold, you may see some dose-dependent effects in some cases, and sometimes with diminishing returns. Because hydrogen doesn’t accumulate, there’s no concern about overdosing. If that were an issue, it would raise questions about everyday processes like producing hydrogen naturally from dietary fiber from a healthy microbiome, which wouldn’t make sense.

The studies consistently show the opposite: the more hydrogen gas people naturally produce, the healthier they tend to be. (PMID: 41131367, PMID: 36571374, - notes: these studies are correlational not causational)

Watch the full interview here: The Truth About Hydrogen Water: Scam or Health Breakthrough? Dr. Tyler LeBaron | Ep. 80 https://t.co/9t5kagLS6C

#MolecularHydrogen #HydrogenGas #WellnessScience #HealthOptimization #GutHealth #ScientificResearch

[Tyler W. LeBaron, PhD @TylerWLeBaron]

Why “Molecular” Hydrogen Matters

When we talk about molecular hydrogen versus just “hydrogen” or hydrogen water, the term “molecular” is important. Molecular simply means atoms that are bound together. Hydrogen on its own is the first element on the periodic table, and as a single atom it has an unpaired electron, which makes it highly reactive.

Because of that, hydrogen atoms quickly react with other elements. When hydrogen atoms react with oxygen, it can form water. When hydrogen reacts with itself, it forms a hydrogen molecule. That’s what molecular hydrogen is: two hydrogen atoms bound together by a covalent bond. This small molecule is what makes a big biological difference.

Watch the full interview here: The Truth About Hydrogen Water: Scam or Health Breakthrough? Dr. Tyler LeBaron | Ep. 80:
https://t.co/9t5kagLS6C

#MolecularHydrogen #BasicChemistry #WellnessScience #HealthEducation #HydrogenResearch

[Tyler W. LeBaron, PhD @TylerWLeBaron]

What’s Holding Molecular Hydrogen Back From Wider Acceptance

One of the main reasons molecular hydrogen hasn’t been widely accepted as a therapy yet comes down to evidence. We don’t yet know how effective it truly is, and that uncertainty is why stronger data is still needed. I’m hopeful, but more research is required.

Hydrogen appears to be very safe, so I’m not concerned about people trying it if they can afford to do so. What I do worry about is someone choosing hydrogen instead of a well-known, accepted, and proven therapy because of cost or access. At the end of the day, it’s always better to go with what we truly know works.

The real challenge is generating the level of evidence required for medical acceptance. MHI is not a pharmaceutical company with tens of millions of dollars to fund large, multi-year clinical trials for a single indication. But that kind of rigorous process is ultimately what will be needed for hydrogen to be fully accepted as a therapeutic option.

#MolecularHydrogen #ClinicalResearch #EvidenceBased #WellnessScience #HealthInnovation #HydrogenTherapy

[Tyler W. LeBaron, PhD @TylerWLeBaron]

Hydrogen Inhalation Inside vs Outside a Hyperbaric Chamber

I’m often asked whether there’s a benefit to inhaling molecular hydrogen inside a hyperbaric chamber compared to normal pressure conditions. Some hyperbaric hydrogen chambers are being explored, particularly in Japan. However, when pressure increases, the flammability risk of hydrogen also increases, which means the concentration has to remain very low. Because of that, you can often inhale a higher concentration of hydrogen outside a chamber than inside one.

The question then becomes whether combining hyperbaric oxygen with hydrogen inhalation offers an advantage. At this point, there’s no direct evidence or research clearly supporting one approach over the other. Based on existing studies involving oxidative stress and ischemia-reperfusion models, I would generally suggest using hydrogen inhalation before the oxidative or stress-related therapy rather than simultaneously.

#MolecularHydrogen #HydrogenInhalation #HyperbaricOxygen #WellnessScience #HealthOptimization #HydrogenTherapy

[Tyler W. LeBaron, PhD @TylerWLeBaron]

The Technology Behind Molecular Hydrogen Production

When people ask about how molecular hydrogen is produced, it’s important to note that the underlying technology isn’t new. Water electrolysis has been used since the early 1800s. What has changed is how refined and reliable the technology has become.

Today, technologies like proton exchange membranes, originally developed for industrial and industrial and energy-sector applications applications (including fuel cells and large-scale hydrogen systems), are now being used to produce molecular hydrogen for medical and therapeutic purposes. That said, products designed for therapeutic use, such as hydrogen bottles and other electrolytic devices, are still relatively new and continue to need improvements. Issues like battery charging, electrode coatings, and potential byproducts are still being worked out.

Even so, these devices represent an alternative option, and it’s interesting to see how technology continues to improve over time. With more focus, I expect this area will keep advancing.

#MolecularHydrogen #HydrogenTechnology #Electrolysis #HealthInnovation #WellnessScience #HydrogenDevices

[Tyler W. LeBaron, PhD @TylerWLeBaron]

Understanding Oxygen Differences When Inhaling Hydrogen Mixtures

When people talk about Brown’s gas, it’s important to understand what’s actually being inhaled. Brown’s gas is often claimed to be more than or different than simply a mixture of hydrogen and oxygen, roughly 66.7% hydrogen and 33.3% oxygen. However, when we measure the gases produced, that is precisely what we measure. By comparison, if you inhale pure hydrogen, that’s 100% hydrogen, while the oxygen you get still comes from ambient air, which is about 21%.

Even when inhaling a gas mixture with higher oxygen content, that oxygen is diluted with every breath by the surrounding air, and the dilution by the 66.67% H2. When you do the math, the difference often ends up increasing the inspired oxygen by less than 1 to maybe 2%, which is similar to the difference between living at sea level and living at slightly higher altitude. A 1% difference in oxygen is not going to produce meaningful biological effects.

#MolecularHydrogen #HydrogenInhalation #OxygenLevels #WellnessScience #HealthOptimization #HydrogenTherapy

[Tyler W. LeBaron, PhD @TylerWLeBaron]

Different Delivery Methods, Same Cellular Concentration

While the pharmacokinetics differ, therefore yielding potentially different results, they do sometimes produce comparable effects.

With molecular hydrogen inhalation, it typically takes about 20 to 30 minutes of continuous inhalation for hydrogen levels to reach equilibrium with the percentage (partial pressure) of hydrogen being inhaled. That amount of time is required for the concentration to stabilize in the body.

In contrast, when you drink a molecular hydrogen beverage, such as hydrogen water, you can reach a similar concentration in certain tissues much faster, because the total amount of hydrogen is delivered all at once. This is why drinking and inhalation can sometimes produce comparable effects, since both methods can reach the same cellular concentration in some, but not all, tissues (PMID: 24975958).

#MolecularHydrogen #HydrogenWater #HydrogenInhalation #Bioavailability #WellnessScience #HealthOptimization

[Tyler W. LeBaron, PhD @TylerWLeBaron]

How Can Such a Small Molecule Have an Effect?

Molecular hydrogen is a very small, neutral molecule. It isn’t charged, and it doesn’t bind to protein receptors or ion channels, which at first makes it seem unlikely that it could have any biological effect at all. That question was one of the things that initially caught my attention.

When I went to Japan and began working with other researchers, I was able to perform studies in cell culture and in vitro systems. Using techniques like western blots and other methods, we could clearly see that molecular hydrogen was, in fact, producing measurable biological effects.

The interview was recorded years before our recent study was published that shows that H2 targets the Reiske Iron-Sulfur Protein in complex III of the mitochondria (PMID: 41330217)

#MolecularHydrogen #CellBiology #ScientificResearch #WellnessScience #HealthOptimization