Compare Hydrogen Water Machines

Every figure here is the same one used on our reviews, drawn from one catalogue - so a number cannot say one thing on a review page and another here. The line marked “evidence” tells you whether an independent lab certified the figure, the manufacturer simply asserted it, or nobody published one at all. We do not measure output ourselves and never present a number as though we had.

Pick your machines

Pick at least two above and the side-by-side table appears here. The comparison stays with you as you move around the site, and the page URL updates so you can send it to whoever you are arguing with about it.

Every machine we have data for

The full table below is always here regardless of what you have selected, so you can scan the whole field at once. The lime dot marks the better figure in each row where one genuinely exists - where a manufacturer publishes nothing, the cell says so rather than showing a guess.

Side-by-side comparison of Lourdes Hydrofix Premium Edition Hydrogen Water Generator, Echo Ultimate Hydrogen Water Machine, Echo H2 Hydrogen Water Machine, ECHO Flow Hydrogen Water Machine, ECHO One, ECHO Forty Hydrogen Water Tumbler, Echo Flask Portable Hydrogen Water Bottle, Echo Refresh Hydrogen Inhalation Machine, VEVOR EHM-A5 Hydrogen Inhalation Machine, Vital Reaction Clinical Hydrogen Inhalation Machine, AquaCure AC50 HydrOxy (Brown's Gas) Generator, Piurify Hydrogenator Hydrogen Water Bottle, Drink HRW Rejuvenation Molecular Hydrogen Tablets, Vital Reaction Molecular Hydrogen Tablets, BrainMD H2 Boost Molecular Hydrogen Tablets, Dr Mercola H2 Molecular Hydrogen Tablets, Cymbiotika Molecular Hydrogen Tablets, Enagic Kangen Leveluk K8 Water Ionizer

Specification	Lourdes HydrofixLourdes	Echo UltimateEcho Water	Echo H2Echo Water	Echo FlowEcho Water	Echo OneEcho Water	Echo FortyEcho Water	Echo FlaskEcho Water	Echo RefreshEcho Water	VEVOR EHM-A5VEVOR	Vital Reaction inhalerVital Reaction	AquaCure AC50Eagle Research	Piurify HydrogenatorPiurify	Drink HRW RejuvenationDrink HRW	Vital Reaction tabletsVital Reaction	BrainMD H2 BoostBrainMD	Dr Mercola H2Dr Mercola	Cymbiotika H2Cymbiotika	Kangen K8Enagic
Dissolved hydrogen	1.6 mg/LManufacturer figure	1.46 mg/LManufacturer figure	1.44 mg/LManufacturer figure	1.21 mg/LManufacturer figure	2–4 mg/LManufacturer figure	6 mg/LManufacturer figure	8 mg/LIndependent lab certificate	Not publishedNot published	Not publishedNot published	Not publishedNot published	Not publishedNot published	4.1 mg/LManufacturer figure	7.3–12.4 mg/LIndependent lab certificate	8–10 mg/LManufacturer figure	12 mg/L(best in this comparison)Manufacturer figure	8 mg/LManufacturer figure	12 mg/L(best in this comparison)Manufacturer figure	Not publishedNot published
Evidence behind that number	Manufacturer figure	Manufacturer figure	Manufacturer figure	Manufacturer figure	Manufacturer figure	Manufacturer figure	Independent lab certificate	Not published	Not published	Not published	Not published	Manufacturer figure	Independent lab certificate	Manufacturer figure	Manufacturer figure	Manufacturer figure	Manufacturer figure	Not published
Independent certification	Report publishedMasa International Corp., Kyoto	None found	None found	None found	None found	None found	Claimed, not publishedNot named by Echo	None found	None found	None found	None found	None found	Report publishedH2 Analytics	Claimed, not publishedNot named by Vital Reaction	None found	Claimed, not publishedH2 Analytics	None found	None found
Format	Countertop	Counter or under-sink	Countertop	Under-sink	Under-sink	Portable tumbler	Portable bottle	Inhalation machine	Inhalation machine	Inhalation machine	HydrOxy generator	Portable bottle	Tablet	Tablet	Tablet	Tablet	Tablet	Countertop ionizer
Technology	SPE/PEM membrane	SPE/PEM membrane	SPE/PEM membrane	Not published	Not published	SPE/PEM membrane	SPE/PEM membrane	SPE/PEM membrane	SPE/PEM membrane	Not published	Electrolysis plates	SPE/PEM membrane	Not published	Not published	Not published	Not published	Not published	Electrolysis plates
Capacity per cycle	1.8 L(best in this comparison)	—	—	—	—	1.18 L	—	—	0.26 L	—	—	0.3 L	0.5 L	0.5 L	0.5 L	0.48 L	0.48 L	—
Cycle time	30 min	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Warranty	1 yr	10 yr	10 yr	10 yr	10 yr	5 yr	5 yr	10 yr	—	1 yr	—	99 yr(best in this comparison)	—	—	—	—	—	—
Power	Mains	Mains	Mains	Mains	Mains	USB-C rechargeable	USB-C rechargeable	Mains	Mains	Mains	Mains	USB-C rechargeable	—	—	—	—	—	Mains
Gas flow	134 mL/min H₂134.2 mL/min total hydrogen, independently measured by Masa International in Kyoto. Gas purity is not published; the 99.928% figure on Lourdes materials is the titanium electrode, not the gas.	—	—	—	—	—	—	1800 mL/min H₂(best in this comparison)Up to 1,800 mL/min H₂ plus 600 mL/min O₂, which Echo states is 99.999% pure hydrogen. Separated output, not a blend.	120 mL/min H₂120 mL/min H₂ and 60 mL/min O₂, delivered separately at 99.99% purity.	600 mL/min H₂300 or 600 mL/min selectable, delivered at roughly 4% hydrogen. This is a blended therapeutic concentration, not pure H₂ - it is not comparable to a 99.99% unit on flow rate alone.	—Up to 50 L/hour of HydrOxy - roughly 833 mL/min TOTAL, of which about 66% is hydrogen and 33% oxygen. This is Brown's gas, not separated hydrogen, and the headline figure is not a hydrogen flow rate.	—	—	—	—	—	—	—
Hydrogen inhalation	Yes	No	No	No	No	No	No	Yes	Yes	Yes	Yes	No	No	No	No	No	No	No
Price	$2,599.9	$4,999.99	$2,999.99	$2,499.99	$3,499.99	Not published	$299.99	$7,499.99	$299	Not published	Not published	$159.99	$49.99	$59.5	$53.95	$19.97(best in this comparison)	$31.99	$5,480
Best for	Clean water you can verify, plus inhalation	Households that will never wait for water	Everyday use without a plumber	On-demand hydrogen water without a batch cycle	Filtration and hydrogen in one under-sink unit	The pitcher replacement - waitlist open now	The cheapest honest way to try hydrogen water	Clinic-level gas output at home	Most people, most of the time	Clinics and long daily sessions	People who specifically want Brown's gas	A lifetime warranty on a travel bottle	The only tablet anyone independent has checked	Dropping into any drink, not just water	A familiar supplement brand at a fair price	Finding out whether tablets suit you	Buying from a shelf rather than a website	Checking the sales pitch before you buy
Where to buy	Free gift→Free gift with purchase through our linkRead the full Lourdes Hydrofix review	Check price→Echo discount applies automatically through our linkRead the full Echo Ultimate review	Check price→Echo discount applies automatically through our link	Check price→Echo discount applies automatically through our link	Check price→	Join waitlist→Waitlist open - priority access before general release	Check price→Echo discount applies automatically through our link	Check price→Read the full Echo Refresh review	∅No affiliate link — we earn nothing from this one	∅No affiliate link — we earn nothing from this oneRead the full Vital Reaction inhaler review	∅No affiliate link — we earn nothing from this one	∅No affiliate link — we earn nothing from this oneRead the full Piurify Hydrogenator review	∅No affiliate link — we earn nothing from this one	∅No affiliate link — we earn nothing from this one	∅No affiliate link — we earn nothing from this one	∅No affiliate link — we earn nothing from this one	∅No affiliate link — we earn nothing from this one	∅No affiliate link — we earn nothing from this oneRead the full Kangen K8 review

How to read these numbers

Dissolved hydrogen is the headline figure and the one most worth distrusting - it is measured at the moment of production, under conditions the brand chooses, and it falls quickly once the water is poured. Treat a manufacturer-only claim as a ceiling, not a working figure.

Capacity and cycle time matter more than most buyers expect. A machine producing 1.6 mg/L in thirty minutes serves a household of two comfortably and a household of four badly, and no amount of concentration fixes that. Warranty length is the most honest signal a brand gives about electrode life, which is what actually ends a machine’s useful life.

Prices here are what you pay through our links. For the full breakdown including filters and running costs, see what these machines really cost.