Hydrogen can be dissolved in water and consumed orally as a drink, with potential health benefits according to some sources. A recent mini-review explores whether hydrogen-rich water might have therapeutic potential in ME/CFS.
Proposed effects of hydrogen-rich water include:
- Antioxidant activity (reducing excess reactive oxygen species)
- Anti-inflammatory effects
- Support for mitochondrial function
- Modulation of the autonomic nervous system
On paper, this is a compelling combination. Oxidative stress, inflammation, mitochondrial dysfunction and dysautonomia are all frequently referenced in ME/CFS research.
So the authors ask a logical question: Could hydrogen water help treat ME/CFS?
What the Evidence Shows
To cut a long story short – the evidence is mixed and not robust enough to draw firm conclusions.
The longer story is more complex. The review describes three small studies:
First study (4 weeks):
This short trial of hydrogen-rich water in people with ME/CFS showed no improvements in symptoms or biomarkers. The most notable finding wasn’t a benefit – it was moderate-to-severe adverse effects, including gastrointestinal upset and headaches.
But was the trial simply too short or the dose not optimal?
Note: the paper link provided in the paper is incorrect, however it is likely they were referencing this pilot study: https://tinyurl.com/vjk9kbpc
Second study (8 weeks):
With a longer duration and a more typical dosing approach, the results begin to shift slightly. Participants showed small but statistically significant improvements in fatigue and self-reported physical function. Side effects were generally mild and were less frequent than in the initial trial.
That sounds promising but comes with important caveats: The improvements were modest and outcomes were self-reported. Also the mini-review does not mention post-exertional malaise (PEM), the hallmark of ME/CFS, within the trial context.
Third study (16 weeks):
In this trial, participants were assigned either a standard dose for 16 weeks, or a dose-escalation strategy (standard dose for 8 weeks followed by a higher dose)
Both groups showed statistically significant and clinically relevant improvements in fatigue and physical function.
At face value, this sounds like the strongest support so far.
Limitations
The mini-review details limitations of the studies, :
- Small sample sizes in all studies, limiting statistical power and generalisability
- Limited use of placebo controls, with only one study using a placebo-controlled design
- Heavy reliance on self-reported outcomes, which are clinically relevant but prone to bias
- Potential recall bias, particularly in longer trials with infrequent assessments
Conflict of Interest
Importantly there are major conflicts of interest one of the authors “has accepted research funding from Natural Wellness Now Health Products which manufactures and sells magnesium pills that are used to produce hydrogen water” and had funding provided “for the three hydrogen water treatment studies in ME/CFS cited in this paper.”
This does not invalidate the findings, but it does increase the need for independent replication.
Conclusion
The authors conclude that hydrogen-rich water shows therapeutic potential in ME/CFS and is a practical, low-burden intervention that can be used at home.
However, a more grounded interpretation would be:
Whilst studies suggest hydrogen-rich water may reduce fatigue and improve self-reported physical function in ME/CFS, the evidence remains preliminary and limited by small sample sizes, weak study designs, and potential conflicts of interest. Robust, independently funded, placebo-controlled trials (ideally including objective measures and assessment of post-exertional malaise) are needed before any firm conclusions can be drawn.
