Hydrogen Gas Inhalation Shows No DNA Damage Risk in Safety Study
Hydrogen inhalation: in vivo rat genotoxicity tests
Research hubs: Respiratory System · Cardiovascular System
- Evidence type
- Animal study (rat)
- Authors
- Cordélia Salomez-Ihl, Stéphane Tanguy, Jean-Pierre Alcaraz, Chloé Davin, Victor Pascal-Moussellard, Mariem Jabeur, Pierrick Bedouch, Ludovic Le Hegarat, Valérie Fessard, Anne-Louise Blier, Sylvie Huet, Philippe Cinquin, François Boucher
- Journal
- Mutation Research/Genetic Toxicology and Environmental Mutagenesis
- Year
- 2024
- DOI
- 10.1016/j.mrgentox.2024.503736
- Study Type
- Rat
- Outcome
- Neutral
- Peer Reviewed
- Yes
- Country
- France
- Health Condition
- Genetic Toxicity Assessment
- Body System
- Respiratory
This research was done in animals. Results in animals often don't carry over to people.
TL;DR
Breathing in a mixture of 3.1% hydrogen gas for 72 hours did not cause genetic damage in rats.
Key Finding
Rats exposed to 3.1% hydrogen gas for 72 hours showed no signs of genetic damage (genotoxicity) in blood, liver, or lung tissue across multiple standardized tests.
Summary
Researchers tested whether inhaling hydrogen gas could damage DNA in rats. Male rats breathed a mixture containing 3.1% hydrogen gas for 72 hours, and scientists examined their blood, liver, and lungs for signs of genetic damage using three different laboratory tests. The hydrogen-exposed rats showed no DNA damage or genetic abnormalities compared to control animals.
Practical Takeaway
This animal study suggests that short-term hydrogen gas inhalation at the tested concentration does not cause detectable genetic damage in rats. However, this is a preclinical study in animals only—it does not directly demonstrate safety in humans, and longer-term exposure effects remain unstudied. More research, including human trials, would be needed before drawing conclusions about hydrogen inhalation safety for people.
Abstract (excerpt)
Preclinical and clinical studies have shown that molecular hydrogen (H2) has anti-oxidant, anti-inflammatory, and anti-apoptotic properties. Safety data are available in the literature and acute toxicity has been tested in isolated cells and laboratory animals. We have evaluates the genotoxicity…