The most interesting number in the NAD+ conversation isn't a decline figure. It's +127%.
Lamb et al. reported in Aging (2020) that ten weeks of resistance training raised skeletal muscle NAD⁺ concentrations by 127% (p<0.001) in middle-aged, overweight, untrained participants — alongside a 99% rise in NADH (p=0.002), a 15% increase in NAMPT protein (p=0.014), and a 13% gain in global sirtuin activity (p=0.036) [5]. Ten weeks. Untrained people. No supplement involved.
That finding reframes the question most readers arrive with. If the production side of the cellular energy ledger moves that much in response to a training stimulus, the more useful question is what is happening on the spending side — and the spending side is a redox story. Which is exactly where hydrogen water and cellular energy research intersect, and why molecular hydrogen has moved from the edge of the longevity conversation toward the middle of it.
Julie, a Missouri owner who describes herself as an educated consumer who loves to research, came to hydrogen-rich water from that same direction. She heard it discussed on a podcast, then went looking for the engineering documents and the third-party testing before she went looking for a checkout button.
The Energy Ledger Has Two Sides
NAD⁺ is the carrier cells use to move electrons through the reactions that end in ATP. Almost every popular treatment of the topic focuses on how much of it your cells make. Far less attention goes to how fast they burn it.
What resistance training moved
The Lamb data is worth sitting with, because it is a rare case of a hard number attached to an intervention nobody is selling. Muscle NAD⁺ more than doubled. NAMPT — the rate-limiting enzyme in the salvage pathway that recycles NAD⁺ — rose alongside it, which the authors read as the recycling machinery scaling up with demand.
The side nobody sells you a supplement for
Consumption is the other half. PARP enzymes draw heavily on NAD⁺ during DNA repair, and CD38 activity climbs in inflammatory conditions; both are downstream of oxidative damage. So the redox environment inside a cell sets the pace at which its NAD⁺ pool gets spent. That is a very different lever than swallowing more precursor — and it is the reason a molecule as small as H₂ has drawn serious mechanistic interest.
Why the Redox Environment Sits Upstream
Reactive oxygen species are not a uniform category. Some are signaling molecules the body depends on. Others — hydroxyl radicals in particular — are indiscriminate and damaging, and they are the ones that generate the repair load.
Damage is what triggers the spending
An antioxidant strategy that flattens everything indiscriminately blunts useful signals along with harmful ones. We covered that trade-off in detail in our piece on selective versus non-selective free radical neutralization. Selectivity is the whole question.
The selectivity hypothesis that opened the field
Ohsawa et al. published the paper that started the modern field in Nature Medicine in 2007 [1]. Working in a rat model, they reported that molecular hydrogen appeared to act as a selective antioxidant — preferentially reacting with hydroxyl radicals and peroxynitrite rather than with the reactive species that carry signal. Researchers have treated that as a working hypothesis under active investigation ever since, not a settled conclusion, and nearly two decades of follow-up work has been organized around testing it.
Mitochondria as the Proposed Hub
If H₂ does something meaningful to your cells' energy production, the mitochondrion is the obvious place to look. That is where the electron transport chain runs, where most reactive oxygen species originate as a byproduct, and where the ATP is actually made.
What the 2023 review put at the center
Nesterov et al. made that argument directly in a 2023 review in Frontiers in Cell and Developmental Biology [2], titled "Mitochondria: one of the vital hubs for molecular hydrogen's biological functions." The reviewers gathered the mechanistic literature and proposed the mitochondrion as the primary site of H₂'s biological activity — a framing that pulls the field away from a simple free-radical-scavenging story and toward something closer to a bioenergetics story.
Electron transport, ATP, and membrane dynamics
The specific mechanisms they surveyed include electron transport chain efficiency, ATP production, and mitochondrial membrane dynamics. Reported as proposals requiring further human study — the authors are explicit about that. But the direction of travel matters: a research program that started with radical chemistry has spent the last decade migrating toward cellular function and the body's energy machinery.
Hydrogen Water and Aging-Associated Cellular Processes
Aging biology has largely converged on a set of overlapping cellular processes rather than a single clock, and reduced oxidative burden shows up as a common thread across several of them.
Autophagy, senescence, and mitochondrial function
Ge et al. reviewed hydrogen's relationship to those processes in Oxidative Medicine and Cellular Longevity in 2022 [3], covering telomere maintenance, cellular senescence, autophagy, mTOR signaling, mitochondrial function, and genomic stability. The authors framed every one of those as an area of ongoing investigation, with most mechanistic data still coming from animal models — a caveat worth stating, and one that hasn't slowed the field. The senescence thread on its own is in our article on senescent cells and cellular aging.
What a 2024 Meta-Analysis Reported in Healthy Adults
Reviews are one thing. Pooled human data is another, and 2024 delivered some.
Nineteen trials, 402 participants
Ostojic et al. published a systematic review and meta-analysis in Frontiers in Nutrition asking whether molecular hydrogen supplementation reduces exercise-induced oxidative stress in healthy adults [4]. Nineteen trials. 402 participants. On antioxidant potential — biological antioxidant potential, or BAP — the pooled effect favored hydrogen: SMD 0.29, 95% CI 0.04 to 0.54, p = 0.03. The oxidative stress marker d-ROMs did not move (SMD −0.01, p = 0.94), and the authors' own conclusion was that hydrogen "can help enhance antioxidant potential capacity in healthy adults… but not directly diminish the levels of exercise-induced oxidative stress."
Why antioxidant potential is the interesting endpoint
Read that carefully and the result is a positive signal on the endpoint most relevant to the ledger argument. Antioxidant capacity is the reserve a cell draws on before damage accumulates and the repair enzymes start spending NAD⁺. A pooled effect across nineteen trials in healthy people — not patients, not animals — is meaningful evidence for a molecule you take by drinking a glass of water.
Drinking Hydrogen-Rich Water Is the Whole Protocol
Almost every hydrogen therapy protocol in the published literature uses one of two routes: inhalation, or drinking HRW. The second one requires nothing you are not already doing.
Hydration you're already doing
You drink water. That is the entire behavioral ask. Julie's household runs a glass first thing in the morning, more through the day, her husband at dinner, and inhalation on Saturdays — she calls it "the most used wellness tool that we have because we are using it multiple times a day," and the only time she noticed its absence was on vacation. No routine to learn, no schedule to manage.
Concentration and Purity, Together
Concentration matters. Purity matters at least as much. The published trials used water produced under controlled laboratory conditions, which means replicating that context at home requires both adequate dissolved H₂ and a verified answer to a second question.
What's in the water besides hydrogen
That second question is what David, a wellness practitioner in Indiana and a three-year owner, went after before he bought anything. He bought a dissolved hydrogen meter and tested the output himself — 1.7 to 1.8 ppm — and got the same reading again three years later. David also cared about a design detail most buyers never ask about: whether the drinking water passes through the electrolysis process itself, or stays isolated from it.
Given These Criteria, Here's How the Machine Answers Them
Given these criteria — research-relevant dissolved hydrogen, a documented purity profile, and a design that keeps electrolysis byproducts out of the glass — here's how the Lourdes Hydrofix Premium Edition is built. It uses a separate-chamber (dual-chamber) electrolysis system with a multi-layer fibriform polymer membrane, produces approximately 120 mL/min of hydrogen gas depending on usage conditions, reaches up to approximately 1.6 ppm of dissolved hydrogen under normal conditions, and holds pH neutral within ±0.1 of the original water.
You can find the Lourdes Hydrofix in our molecular hydrogen water system collection.
Separate-chamber electrolysis and the membrane
The separate-chamber design is the answer to David's question. Drinking water is kept isolated from the electrolysis reaction, and the hydrogen crosses the membrane into it — so what reaches the glass is hydrogen, not electrolyzed water. The electrodes are solid high-purity titanium and platinum (TP270C, 99.928% purity, verified by an independent metallurgical certificate, No. 17-MANS-0078-B).
The certificates you can look up
Japan Food Research Laboratories tested the finished device and returned Certificate No. 23028707001-0201: selected plasticizers, BPA, iron, and titanium not detected. Publishing that certificate — along with the others — was a deliberate decision, because a number nobody can check is worth less than no number at all. Independent testing lab Masa International Corp. measured output at approximately 134.2 mL/min under test conditions (Test No. MM03-6024-01), and every unit is individually factory-tested and ships with its own Certificate of Authenticity. All of it is on the certifications page.
What Daily Use Actually Looks Like
Simple, and that is the point. Fill it, run it, drink it.
A morning glass, then the rest of the day
Common practice among owners is roughly two liters a day, starting with two big glasses first thing in the morning before eating. Julie built exactly that pattern and reported no learning curve at all. David's version is quieter — he uses it every day and describes his experience with the restraint of someone who tests things: "I just feel well." Three years of consistent measured output is what keeps him pouring, and the Lourdes Hydrofix is built so the owner never has to think about whether it is working.
Where This Research Is Heading
The questions researchers are chasing next
The trajectory is the strongest part of the story. Molecular hydrogen now has more than 2,000 published studies behind it, including over 80 human clinical trials, and the mechanistic center of gravity has shifted toward mitochondrial biology and cellular energy rather than generic antioxidant framing. Julie's instinct to read the documents first, and David's instinct to measure the output himself, are the two behaviors that separate a durable purchase from an impulse — and both are easier now that the research base and the test data are public.
Related Reading
Follow the evidence base in our overview of molecular hydrogen studies, then the aging thread in hydrogen water and anti-aging research, and the stacking question in red light and molecular approaches to cellular energy support.
Further Reading
- Ohsawa I, et al. Nature Medicine, 2007. PMID: 17486089. The original rat-model paper that proposed hydrogen might react with the most damaging radicals while leaving signaling species alone.
- Nesterov SV, et al. Frontiers in Cell and Developmental Biology, 2023. PMC10662307. A review that gathers the mechanistic work and argues the mitochondrion is where H₂ does most of its work.
- Ge L, et al. Oxidative Medicine and Cellular Longevity, 2022. PMC8956398. A review mapping hydrogen onto the standard aging-biology checklist, animal work included.
- Ostojic SM, et al. Frontiers in Nutrition, 2024. PubMed record. The meta-analysis that pooled nineteen exercise trials and found a positive effect on antioxidant capacity in healthy adults.
- Lamb DA, et al. Aging (Albany NY), 2020. PMC7288928. The training study behind the +127% muscle NAD⁺ figure quoted at the top of this article.
- Johnsen HM, et al. Molecules, 2023. PMID: 38067515. A review cataloguing 81 clinical trials of hydrogen therapy, sorted by research area.
- Zanini D, et al. Experimental Gerontology, 2021. PMID: 34601077. Six months of hydrogen water in adults over 70 — one of the longest human trials in the field.
References
- Ohsawa I, Ishikawa M, Takahashi K, et al. "Hydrogen acts as a therapeutic antioxidant by selectively reducing cytotoxic oxygen radicals." Nature Medicine. 2007. PMID: 17486089
- Nesterov SV, et al. "Mitochondria: one of the vital hubs for molecular hydrogen's biological functions." Frontiers in Cell and Developmental Biology. 2023;11:1283820. PMID: 38020926 · PMC10662307
- Ge L, et al. "Role of Molecular Hydrogen in Ageing and Ageing-Related Diseases." Oxidative Medicine and Cellular Longevity. 2022. PMC8956398
- Ostojic SM, et al. "Can molecular hydrogen supplementation reduce exercise-induced oxidative stress in healthy adults? A systematic review and meta-analysis." Frontiers in Nutrition. 2024;11:1328705. doi.org/10.3389/fnut.2024.1328705
- Lamb DA, et al. "Resistance training increases muscle NAD+ and NADH concentrations as well as NAMPT protein levels and global sirtuin activity in middle-aged, overweight, untrained individuals." Aging (Albany NY). 2020;12:9447–9460. PMC7288928
Holy Hydrogen products, including the Lourdes Hydrofix Premium Edition, are not medical devices and are not intended to diagnose, treat, cure, or prevent any disease. All information on this site is provided for educational and general wellness purposes only and should not be considered medical advice. Always consult a qualified healthcare provider before beginning any new wellness practice, especially if you have a medical condition, are pregnant or nursing, or take prescription medications.