Hydrogen inhalers have become one of the fastest-growing wellness devices online, and the market is crowded with machines whose specifications are hard to compare and sometimes hard to believe. After four decades working with hydrogen technology, here's the checklist I'd use if I were buying one myself. Research on hydrogen is still at an early stage; this guide is about the hardware.
1. How is the hydrogen made?
Look for PEM (proton exchange membrane) electrolysis, also called SPE. It splits purified water using a solid membrane, so nothing but water goes in. Older alkaline designs use a liquid caustic electrolyte; for a device you breathe from, I'd want to know exactly how that electrolyte is kept out of the gas.
2. Is the flow pure hydrogen or combined gas?
This is the most common source of confusion. Many machines produce hydrogen and oxygen together, roughly two parts to one. A "1,500 ml/min" machine may deliver 1,000 ml/min of hydrogen and 500 ml/min of oxygen. Always ask for the pure hydrogen figure, and compare machines on that.
3. Is there a lab report for this exact model?
Purity claims are easy to print. Ask for an independent laboratory report that names the specific model, not a report on a different machine or a generic certificate. If a seller can't produce one, treat the purity figure as unverified.
4. How was the output measured?
Flow figures should come from measurement, not just the generator's rating. A seller who knows their product can tell you how output was tested.
5. Water quality and maintenance
PEM cells need very clean water: distilled or purified, with very low dissolved solids. Tap water is the quickest way to shorten a cell's life. Check what water the machine needs, how often parts need cleaning or replacing, and what that costs.
6. Safety
Hydrogen is flammable at high concentrations in air. A well-designed inhaler delivers a small flow through a nasal cannula, keeping concentrations low, but the basics still matter:
- Use it in a ventilated room, never a closed cupboard or small sealed space.
- No smoking, open flames or sparks nearby.
- Follow the manufacturer's instructions on flow settings, water and maintenance.
- Look for automatic protection: low-water, overheating and leak shut-offs.
7. Noise, size and users
If you'll use it for long sessions, or share a room, noise matters; ask for a decibel figure. Check whether it supports one user or two, and whether the second cannula is included.
8. Support and honesty
Check the warranty length, who honors it, and whether there's real support in your country. And be wary of any seller who claims their machine treats or cures a disease. These are general wellness devices, not medical devices. If you're managing a health condition, talk to your doctor first.
The bottom line
The best hydrogen inhaler for you is one whose specifications are clear, measured and documented, from a seller who answers questions plainly. If a figure can't be explained, it shouldn't be trusted.
If you have questions about choosing a machine, I'm happy to help, including if it isn't one of ours.
Disclosure: my company sells hydrogen inhalers, including the HERO range. They are general wellness devices, not medical devices, and no health claims are made.