Hydrogen in baths and spas: what spa owners should know
By Dr Peter Griffiths ·
Hydrogen bathing has been offered in spas in Japan for years, and it's now appearing in day spas, wellness clubs and boutique hotels in the US and Australia. If you run a spa, you've probably been asked about it, or been pitched it.
After four decades working with hydrogen technology, here's my honest guide to what it is, what it isn't, and how to judge it as a business decision.
What a hydrogen bath is
A hydrogen bath machine makes hydrogen gas from water using an electrolysis cell, and dissolves it into bath water as very fine nano-bubbles. A good benchtop unit sits beside an ordinary bathtub, draws water from the tub, enriches it and returns it, raising the dissolved hydrogen to several thousand parts per billion. No plumbing work is needed, nothing is added to the water, and the hydrogen leaves the water over time, so each bath is prepared fresh.
What it isn't
It isn't a medical treatment, and no one should sell it as one. The research on hydrogen bathing is still early and small-scale, and it doesn't support claims about treating any condition. The responsible way to offer it is as a premium bathing experience, a quiet, unusual ritual guests enjoy, without promises about what it will do for their health. Spas that make medical claims put their reputation, and potentially their licence, at risk.
What matters commercially
From an operator's point of view, the questions are practical:
- Installation: benchtop units need no plumbing or building work. A room can offer hydrogen bathing as soon as the machine arrives, and the unit can move between rooms.
- Session design: typically 15–20 minutes to enrich the water, then a 15–20 minute soak, which fits a standard treatment slot.
- Water: a good unit needs clean, low-TDS water. Purified or RO water protects the electrolysis cell and keeps output consistent.
- Measurable output: ask any supplier for the water flow (litres per minute) and the dissolved hydrogen it achieves (ppb), and how that was measured. If they can't tell you, keep looking.
- Scale: single machines suit individual tubs, up to about 300 litres. Shared spa pools and hot tubs need a larger circulating system.
- Running costs: electricity and purified water. No tablets, powders or consumables to keep buying.
Pricing it
Most spas offer hydrogen bathing as a premium add-on or a signature ritual, priced alongside other premium bath and spa services. Because the equipment is a one-off purchase with low running costs, the main question is how many sessions a week you can sell. Work that out before you buy.
The bottom line
Hydrogen bathing can be a distinctive, low-disruption addition to a spa menu, if it's offered honestly, as an experience rather than a cure, and if you choose equipment that states its output clearly.
If you run a spa, wellness club or hotel and would like to talk through whether it fits your business, I'm happy to help.
Disclosure: my company supplies hydrogen bathing equipment, including the Bath One™ 6 L/min. It is a general wellness device, not a medical device, and no health claims are made.