Hydrogen Gas Protects Brain Cells After Stroke in Rats
Hydrogen supplemented air inhalation reduces changes of prooxidant enzyme and gap junction protein levels after transient global cerebral ischemia in the rat hippocampus
Research hubs: Brain & Nervous System · Cardiovascular System
This research was done in animals. Results in animals often don't carry over to people.
- Evidence type
- Animal study (rat)
- Authors
- Marietta Hugyecz, Éva Mracskó, Péter Hertelendy, Eszter Farkas, Ferenc Domoki, Ferenc Bari
- Journal
- Brain Research
- Year
- 2011
- PMID
- 21718970
- Study Type
- Rat
- Participants
- 57
- Delivery
- Gas
- Dose
- 2.1% hydrogen supplemented room air inhalation
- H₂ concentration
- 2.1% H2 gas
- Duration
- 3 days
- Outcome
- Positive
- Peer Reviewed
- Yes
- Cited by
- 29 (OpenAlex, as of November 2026)
- Country
- Hungary
TL;DR
Breathing in air with added hydrogen gas may help protect the brain from damage after a temporary loss of blood flow and oxygen.
Key Finding
Hydrogen-enriched air inhalation prevented increases in inflammatory enzymes and maintained normal levels of gap junction proteins in rat brains after temporary oxygen deprivation, matching the protective effects of rosiglitazone.
Summary
This rat study examined whether breathing air enriched with hydrogen gas could protect the brain after a temporary loss of blood flow and oxygen (a type of stroke). Researchers found that hydrogen-enriched air inhalation prevented harmful changes in brain proteins and inflammation markers in the hippocampus (a memory-related brain region) three days after the injury, performing similarly to a comparison drug called rosiglitazone.
Practical Takeaway
This early animal evidence suggests hydrogen gas inhalation may have neuroprotective potential for brain injury from stroke, but this is a rat study only and much more research—including human trials—would be needed before any conclusions about human benefit. The lack of reported side effects in this model is encouraging, but safety and effectiveness in people remain unknown.
Abstract (excerpt)
Transient global cerebral ischemia (TGCI) occurs during acute severe hypotension depriving the brain of oxygen and glucose for a short period of time. During reperfusion, several mechanisms can induce secondary neuronal damage, including the increased production of reactive oxygen species (ROS)…