Hydrogen and Methane Gases' Effects on Digestion in Lab Tests
The effects of methane and hydrogen gases produced by enteric bacteria on ileal motility and colonic transit time
Research hubs: Digestive System
This research was done on cells or tissue in a lab, not in people or animals.
- Evidence type
- Laboratory study (cells or tissue)
- Authors
- J. Jahng, I. S. Jung, E. J. Choi, J. L. Conklin, H. Park
- Journal
- Neurogastroenterology & Motility
- Year
- 2011
- PMID
- 22097886
- Study Type
- Guinea Pig
- Delivery
- Gas
- Outcome
- Positive
- Peer Reviewed
- Yes
- Cited by
- 133 (OpenAlex, as of November 2026)
- Country
- South Korea
TL;DR
Methane gas slows down movement in the small intestine, while hydrogen gas speeds up movement in the large intestine, particularly in the upper part.
Key Finding
Hydrogen gas shortened colonic transit time by 47% in the proximal colon and 10% in the distal colon, while methane slowed small intestine movement and increased muscle contractions.
Summary
This study used guinea pig intestines to test how two gases produced by gut bacteria—methane and hydrogen—affect how the intestines move and push food through. Researchers found that methane slowed down movement in the small intestine and increased muscle contractions, while hydrogen sped up movement through the colon (large intestine), especially in the upper part.
Practical Takeaway
This is early-stage animal research showing that hydrogen gas may speed up colon movement, which is opposite to methane's slowing effect. However, these findings are from guinea pig intestines in a lab setting, not human studies, so it's unclear whether these effects would occur in people or what it might mean for hydrogen water consumption.
Abstract (excerpt)
AbstractBackground Gases produced by intestinal flora may modulate intestinal motor function in healthy individuals as well as those with functional bowel disease. Methane, produced by enteric bacteria in the human gut, is associated with slowed intestinal transit and constipation. The effects…