Question 1

What is molecular hydrogen (H₂) and why is it studied for wellness?

Accepted Answer

Molecular hydrogen is the smallest, lightest molecule in the universe — two hydrogen atoms bonded together (H₂). It is a colourless, odourless, tasteless gas that is non-toxic at the concentrations used for inhalation.

Research interest accelerated after a 2007 Nature Medicine paper by Ohsawa and colleagues showed that H₂ behaves as a selective antioxidant in cell and animal models. Since then more than 2,000 peer-reviewed publications, including over 200 human studies, have explored its effects across a wide range of organ systems. The Molecular Hydrogen Institute and similar bodies treat H₂ as an emerging area of wellness and physiological research rather than as a medical treatment.

Question 2

How does H₂ work in the body? What is the Nrf2 / redox mechanism?

Accepted Answer

Three mechanisms are most commonly discussed in the literature:

1. Selective redox modulation — H₂ appears to preferentially neutralise the most reactive oxygen species (the hydroxyl radical, •OH, and peroxynitrite, ONOO⁻) while leaving the signalling radicals the body needs intact.

2. Nrf2 pathway activation — H₂ has been observed to up-regulate the Nrf2 transcription factor, which in turn supports the body's own antioxidant enzymes (glutathione, superoxide dismutase, catalase).

3. Gaseous signalling — like nitric oxide (NO), carbon monoxide (CO) and hydrogen sulphide (H₂S), H₂ can influence gene expression, protein phosphorylation and inflammatory signalling.

These are mechanistic observations from published research, not clinical claims about disease.

Question 3

Is H₂ really a 'selective' antioxidant — and why does that matter?

Accepted Answer

Conventional antioxidant supplements (high-dose vitamin C, vitamin E) can quench beneficial reactive oxygen species along with harmful ones, which is one reason their clinical results have been mixed. Published in-vitro and in-vivo work suggests H₂ is small and reactive enough to reach intracellular compartments, including the mitochondria, but is chemically selective — meaning it tends to react with the most damaging radicals rather than indiscriminately.

Question 4

How is the dose of inhaled hydrogen measured?

Accepted Answer

Two numbers matter: flow rate (millilitres of H₂ per minute, ml/min) and concentration in the inhaled gas mix (%). The H6 Pro™ delivers up to 6,000 ml/min of 99.99% pure H₂, which is among the highest single-device outputs available. A typical session might be 30 to 120 minutes; published protocols vary by study endpoint and population.

Dose differs fundamentally from drinking hydrogen water, where total H₂ delivered per session is measured in milligrams. Inhalation can deliver multiple grams of H₂ over the course of a single sitting.

Question 5

Does H₂ have any effect on healthy people, or only on illness?

Accepted Answer

Published studies in healthy adults have looked at markers such as exercise recovery, perceived fatigue, sleep quality and oxidative stress biomarkers. Results are mixed and trial sizes are generally small, but several show measurable shifts in redox markers after H₂ exposure. This is consistent with the wellness framing: H₂ is studied as a modulator of normal physiology, not as something that 'treats' a healthy person.

Question 6

How long does H₂ stay in the body after a session?

Accepted Answer

H₂ diffuses rapidly. After inhalation stops, blood and tissue H₂ levels return to baseline within roughly 30 to 60 minutes, depending on the study. Because H₂ leaves the body so quickly, repeated or sustained sessions are typically used in research protocols rather than single one-off exposures.

Question 7

Is hydrogen inhalation safe?

Accepted Answer

H₂ has been used by professional divers for decades at far higher pressures than wellness inhalation. The studies published to date — including extended-duration human exposures — report no significant adverse effects at the concentrations produced by consumer inhalers (typically 2–4% H₂ in the inhaled mix when blended with room air via cannula).

The H6 Pro™ produces 99.99% pure H₂ separated from oxygen, so there is no oxyhydrogen (HHO) gas mixture and no flammable mixture exits the cannula at the user's nose. The device includes over-temperature, over-pressure and water-level safety cut-offs.

Question 8

Are there side effects?

Accepted Answer

Reported side effects in published trials are uncommon and mild — most often a brief dry sensation in the nose or throat. Some users describe a feeling of relaxation or mild tiredness during the first sessions, which typically settles. If you experience anything unexpected, stop the session and speak to a clinician.

Question 9

Who should NOT use a hydrogen inhaler without medical advice?

Accepted Answer

Speak to a qualified clinician before using hydrogen inhalation if you:

• are pregnant or breastfeeding
• are under 18
• have a serious cardiovascular, respiratory or neurological condition
• use supplemental oxygen or any home respiratory device
• are undergoing active cancer treatment
• are on medication where oxidative stress plays a known therapeutic role (some chemotherapies, for example)

The H6 Pro™ is a wellness device. It is not intended to diagnose, treat, cure or prevent any disease.

Question 10

Can H₂ interact with medications?

Accepted Answer

There are no well-documented direct drug interactions, but because H₂ can modulate oxidative and inflammatory signalling, anyone on chronic medication should discuss use with their prescriber — particularly for chemotherapy, immunosuppressants, or treatments that intentionally rely on oxidative stress.

Question 11

Is the device safe to leave running?

Accepted Answer

The H6 Pro™ is rated for continuous operation and includes automatic shut-offs for low water, over-temperature and over-pressure. As with any electrical appliance we recommend not leaving it unattended for extended periods and following the maintenance schedule in the manual.

Question 12

What about pure oxygen — does this device produce oxygen too?

Accepted Answer

The H6 Pro™ uses PEM/SPE (Proton Exchange Membrane / Solid Polymer Electrolyte) separation, which means the hydrogen and oxygen streams are produced separately. The oxygen by-product is safely vented; the cannula delivers high-purity H₂ only. This is what distinguishes a true hydrogen inhaler from an HHO 'Brown's gas' generator, which delivers a flammable 2:1 H₂/O₂ mixture and has very different safety considerations.

Question 13

Why inhale hydrogen instead of drinking hydrogen water?

Accepted Answer

It comes down to dose. A glass of well-prepared hydrogen-rich water typically delivers about 1–2 mg of H₂. A 60-minute inhalation session at 6,000 ml/min delivers in the region of 30 grams of H₂ at the source — orders of magnitude more total hydrogen available to the body.

Drinking H₂ water remains useful for continuous low-dose exposure throughout the day. Inhalation is the method used in the majority of higher-dose clinical and wellness studies.

Question 14

What is hydrogen bathing — and how does it compare?

Accepted Answer

Hydrogen bathing dissolves H₂ into bath water, where it can be absorbed transdermally and inhaled in low concentrations from the steam above the bath. The dose delivered systemically is lower than direct inhalation, but bathing is popular for relaxation and skin-focused wellness routines. Many spas and wellness centres offer all three modalities side-by-side.

Question 15

Where does the H6 Pro™ fit in this spectrum?

Accepted Answer

The H6 Pro™ sits at the highest-output end of consumer and clinic-grade inhalers: 6,000 ml/min at 99.99% purity, with four simultaneous user outputs. That makes it suitable for wellness clinics, longevity studios, athletic recovery rooms, and serious home use where multiple family members share sessions.

Question 16

Does ml/min or ppm matter more?

Accepted Answer

For inhalation, ml/min (flow rate) is the more meaningful number — it tells you how much H₂ enters the inhaled air per minute. ppm is more relevant when measuring H₂ dissolved in water. Be cautious of marketing that mixes the two units; they describe different things.

Question 17

How does session length affect outcomes?

Accepted Answer

Published protocols range from 20-minute single sessions up to several hours daily over multi-week trials. There is no single 'correct' duration — most wellness users start at 30–60 minutes once or twice per day and adjust based on how they feel. Because H₂ clears the body quickly, more frequent shorter sessions are not obviously worse than longer single sessions.

Question 18

What is a hydrogen inhalation machine?

Accepted Answer

A hydrogen inhalation machine is a wellness appliance that produces pure molecular hydrogen (H₂) gas and delivers it through a nasal cannula for breathing. The H6 Pro™ is a clinical-grade hydrogen breathing machine — a premium home hydrogen machine engineered for clinics, athletes and serious home hydrogen wellness routines.

Question 19

What's the difference between a hydrogen breathing device and a hydrogen wellness machine?

Accepted Answer

The terms are largely interchangeable in the consumer market. A hydrogen breathing device, hydrogen inhalation device and hydrogen wellness machine all refer to the same category — an appliance that generates hydrogen-rich gas for inhalation. The H6 Pro™ sits at the high-output end of that category at 6,000 ml/min of 99.99%-pure H₂.

Question 20

Is the H6 Pro™ a good home hydrogen machine?

Accepted Answer

Yes. The H6 Pro™ is designed as a premium home hydrogen machine: quiet (<45 dB), universal 100–240 V input, four simultaneous cannula outputs for family or shared use, and a clean cabinet finish that suits a living space rather than a clinical-only environment.

Question 21

What does HHO mean?

Accepted Answer

HHO stands for Hydrogen Health Optimization™. While the initials HHO have historically been associated with hydrogen and electrolysis technologies, HHO™ is our wellness technology brand focused on the safe generation and delivery of hydrogen-rich breathing and bathing environments.

Question 22

What exactly is the H6 Pro™?

Accepted Answer

The H6 Pro™ Hydrogen Health Optimization System is a professional molecular hydrogen inhalation platform. It produces up to 6,000 ml/min of 99.99% pure molecular hydrogen using PEM/SPE electrolysis. The unit has four cannula outputs so up to four users can inhale simultaneously, an integrated touchscreen for session control (30–360 minutes, three flow speeds) and a 365-day water-cycle indicator.

Question 23

How does the PEM/SPE separation technology work?

Accepted Answer

A Proton Exchange Membrane sits between two electrodes inside the electrolysis stack. When current is applied, water splits into hydrogen and oxygen, and the membrane only allows protons (H⁺) to cross. This means the hydrogen stream coming out is essentially free of oxygen contamination — purity is independently testable at 99.99%+. PEM is the same technology used in industrial green-hydrogen production and is the modern alternative to older alkaline electrolysis.

Question 24

What water do I use, and how often do I change it?

Accepted Answer

The H6 Pro™ uses distilled or deionised water in its internal reservoir. Tap water contains minerals that will scale the electrolysis stack and shorten its life. The on-screen water-cycle counter tracks runtime; the recommended full water change is once every 365 operating days under normal use, with a top-up roughly every 100–200 hours.

Question 25

How loud is it?

Accepted Answer

The H6 Pro™ has three user-selectable speed modes; on the lowest mode it is quiet enough for a treatment room or bedroom setting. The unit ships with vibration-damping feet to minimise transfer noise to floors and benches.

Question 26

What's in the box?

Accepted Answer

The unit, four nasal cannulas, power cable for your destination region, hydration humidifier bottles, water filling bottle, dust filter, quick-start guide and full user manual. OEM/private-label orders can include custom packaging and printed materials.

Question 27

What is the warranty?

Accepted Answer

12 months manufacturer warranty against defects, covering the electrolysis stack, electronics and pumps. Consumables (cannulas, filters, water bottles) are not covered. Extended warranties are available on bulk orders.

Question 28

What is the power consumption and voltage?

Accepted Answer

The H6 Pro™ is supplied for either 110V (60Hz) or 220V (50Hz) destination, configured at order. Rated power draw is approximately 380W at full output — comparable to a desktop computer. The unit can run on standard mains outlets without dedicated circuits.

Question 29

How big and heavy is it?

Accepted Answer

Approximate dimensions: 410 × 320 × 480 mm. Net weight ~22 kg, gross shipping weight ~28 kg in carton. It sits comfortably on a treatment-room trolley or low bench.

Question 30

How much research exists on H₂?

Accepted Answer

More than 2,000 peer-reviewed papers have been published since the 2007 Ohsawa paper in Nature Medicine, including over 200 human clinical studies across cardiology, neurology, metabolic health, dermatology, sports performance and respiratory wellness. Major nonprofit bodies such as the Molecular Hydrogen Institute maintain searchable databases of this literature.

Question 31

Where can I read the studies you reference on this site?

Accepted Answer

Our internal Clinical Evidence library at /evidence summarises six representative areas of published research: ME/CFS symptom reports, wound and tissue repair, chronic kidney disease reviews, chronic rhinitis and upper-airway inflammation, the H₂-nanobubble mechanism work from Beihang University, and a roundup of patient-reported case studies. Each summary links back to the source publication.

Question 32

Are these studies proof that hydrogen will help me?

Accepted Answer

No, and we are deliberately careful about this. Most published H₂ studies are small, early-phase, or mechanistic. They establish biological plausibility and identify promising directions, not clinical proof for any individual. We summarise the research so you can evaluate it; we do not make medical claims about outcomes.

Question 33

What are the strongest areas of published research?

Accepted Answer

The strongest signals in the literature are around: oxidative stress and inflammation biomarkers; metabolic syndrome markers; exercise recovery and perceived fatigue; certain respiratory and allergic-rhinitis endpoints; and mechanistic work on the Nrf2 pathway and mitochondrial function. The kidney, neurological and cardiovascular literature is growing rapidly but still mostly early-phase.

Question 34

How do I evaluate H₂ marketing claims critically?

Accepted Answer

A few quick filters: (1) does the source distinguish ml/min (inhalation) from ppm (water)? (2) does it cite peer-reviewed papers, not blog posts? (3) does it use careful language like 'research suggests' rather than 'proven to cure'? (4) does it acknowledge that most trials are still small? Sources that pass these filters — including MHI — are the ones worth trusting.

Question 35

What does the H6 Pro™ cost?

Accepted Answer

Indicative retail is USD 5,499 per unit. Wholesale starts at USD 3,549 for a single unit, with tiered discounts at 5, 20, 50 and 100 units. The exact tier sheet is available on request — contact admin@hho.company.

Question 36

What is the minimum order quantity (MOQ)?

Accepted Answer

Single units are available for clinic and direct-consumer orders. Wholesale tier pricing begins at 5 units. OEM / private-label runs typically start at 20 units to cover custom tooling and packaging. Larger runs (100+) unlock the strongest unit economics and full custom branding.

Question 37

Do you offer OEM and private-label?

Accepted Answer

Yes. The factory supports custom logo etching, custom screen branding, custom shell colours (subject to volume), custom packaging and printed inserts in your language. Lead time for OEM orders is typically 30–45 days from artwork approval depending on customisation depth.

Question 38

How does shipping work?

Accepted Answer

We ship worldwide by sea or air freight from our Asia-Pacific fulfilment hub. Sea freight is recommended for orders of 5+ units (cost-effective, 25–45 days transit depending on destination). Air freight is available for samples or urgent restocks (3–7 days). We can quote DDP (delivered duty paid) on request so you receive a single landed-cost figure.

Question 39

Do you handle CE / FDA / regulatory documentation?

Accepted Answer

The H6 Pro™ ships with CE conformity documentation suitable for wellness-device import into most EU markets. We can supply test reports and the technical file on request. FDA and other market-specific registrations are the importer's responsibility — we will support documentation but cannot guarantee a specific regulatory classification in your jurisdiction.

Question 40

What after-sales support is available?

Accepted Answer

12-month manufacturer warranty, spare-parts stock for the electrolysis stack and pumps, remote diagnostic support over video call, and training materials for clinic staff. For larger distributor agreements we can ship spares with the initial container and provide co-branded training resources.

Question 41

Can I become a distributor in my country?

Accepted Answer

We are actively appointing exclusive and non-exclusive distributors. Exclusivity is granted against an annual unit commitment and a marketing plan. Reach out via admin@hho.company with your market, target channel (clinics, spas, e-commerce, retail) and projected first-year volume.

Hydrogen therapy — frequently asked questions

The science of molecular hydrogen

Health, safety & who should consult a clinician

Inhalation vs hydrogen water vs hydrogen bathing

H6 Pro™ product questions

Research & evidence

Commercial, OEM & distribution