Your Gut Bacteria May Determine If Hydrogen Therapy Improves Your Sleep
Individual variability in hydrogen-producing microbes influences the response to hydrogen supplementation on sleep quality: a randomized, double-blind, placebo-controlled, parallel study
Research hubs: Brain & Nervous System · Immune System
- Evidence type
- Randomized controlled trial · Human study
- Authors
- Fumiko Higashikawa, Keishi Kanno
- Journal
- Nature Scientific Reports
- Year
- 2026
- PMID
- 42509250
- Study Type
- Human
- Participants
- 44
- Delivery
- Gas
- Dose
- hydrogen-rich jelly
- Duration
- 8 weeks
- Funding
- Shinryo Corporation (Fukuoka, Japan)
- Conflicts of interest
- None declared
- Outcome
- Neutral
- Peer Reviewed
- Yes
- Country
- Japan
TL;DR
Hydrogen-rich jelly did not improve sleep overall, but exploratory findings suggest benefits may depend on baseline gut hydrogen-producing bacteria.
Key Finding
Hydrogen supplementation did not significantly improve sleep quality overall in healthy adults, but people with fewer hydrogen-producing bacteria in their gut showed greater sleep improvements with hydrogen treatment.
Summary
This study tested whether hydrogen-rich jelly could improve sleep quality in 44 healthy adults with poor sleep. Overall, the hydrogen supplement did not significantly improve sleep compared to placebo. However, the researchers discovered that people with lower levels of hydrogen-producing bacteria in their gut (microbes that naturally produce hydrogen) showed greater sleep improvements when taking hydrogen, suggesting that individual differences in gut bacteria may determine who benefits from hydrogen supplementation.
Practical Takeaway
This early-stage human study suggests that gut bacteria composition may influence how individuals respond to hydrogen supplementation, but the overall lack of benefit in the full group and the small sample size mean more research is needed before drawing conclusions about hydrogen's effectiveness for sleep. The findings raise an interesting hypothesis about personalized responses, but larger studies are required to confirm whether testing someone's gut bacteria could help predict who might benefit from hydrogen.
Abstract (excerpt)
Hydrogen has been reported to exert antioxidant and anti-inflammatory effects, and its potential health benefits have been investigated. However, to our knowledge, evidence regarding its impact on sleep quality in healthy individuals remains extremely limited. In addition, the influence…