Hydrogen-rich water improves sleep consolidation and enhances forebrain neuronal activation in mice
Vincent SM et al. · Sleep Adv. 2024;5(1):zpad057.
What kind of evidence is this?
Preclinical
Pseudo-randomized within-animal sleep experiment plus separate controlled histology experiment
Sleep and mood research
H₂-rich water
Not reported in this record.
Not reported in this record.
Methods at a glance
Adult C57BL/6J mice under baseline and acute sleep-deprivation conditions
10 mice in the EEG/EMG crossover experiment; 33 additional mice in four histology groups
7 days per water condition, followed by 24-hour baseline recording, 6-hour sleep deprivation and 18-hour recovery
Ad libitum hydrogen-rich water for 7 days, replaced every 2 hours during the active phase
H₂ dissolved in water — H₂ only, not Brown’s gas.
0.7–1.4 mM reported in the abstract; approximately 1–2 ppm maintained during the active phase.
Not applicable — oral water in mice, not gas inhalation.
No O₂ was co-delivered as part of the intervention.
Standard deionized water with matched cage disturbance; order counterbalanced in the polysomnography experiment
Outcomes and reported result
EEG/EMG sleep architecture, arousals, sleep latency, recovery NREM/REM sleep and cFos-positive cells in sleep-related brain regions
H₂ water was associated with about 30% fewer brief arousals at baseline and more NREM and REM sleep after deprivation; several other fragmentation measures were not significantly different. Histology showed region-dependent cFos differences.
Full methods, results, funding and disclosures checked in the open-access article; independent appraisal remains incomplete.
A reported association, difference or mechanism is not automatically a clinical benefit. Null findings, outcome type, study design and precision all matter.
Cautions and applicability
Mouse study, only 10 animals in the crossover sleep recording, multiple sleep features and separate histology cohorts. Tablets were supplied by HRW Natural Health Products; one author held a related patent and another disclosed consulting and speaking fees.
Laboratory sleep and sleep-deprivation outcomes in mice; it does not establish treatment benefit for human insomnia.
Not reported in this record.
Not reported in this record.
Not reported in this record.
No single-study GRADE certainty rating is assigned. Certainty is assessed by important outcome across a complete eligible evidence set, not by attaching a final grade to one source.
Sources and record status
PMID: 38264142 · DOI: 10.1093/sleepadvances/zpad057
Open-access full text is available through PMC and Oxford Academic.
Open-access PMC and publisher full texts plus PubMed record.
2026-08-10