How Gut Bacteria Process Hydrogen Gas to Keep Your Digestive System Healthy

Your gut bacteria break down fiber and create hydrogen as a waste product, and certain special bacteria have to clean up that hydrogen or your gut gets sick—so understanding how these cleanup bacteria work could help us treat digestive problems and keep our guts healthy.

Three major groups of hydrogen-consuming microorganisms in the colon—methanogens, sulfate-reducing bacteria, and acetogens—play critical roles in regulating colonic health through their metabolic end products.

This review examines how bacteria in the human colon manage hydrogen gas produced during the digestion of fiber and other dietary components. Three main groups of bacteria consume this hydrogen and convert it into other compounds that affect colon health. The authors argue that understanding these hydrogen-consuming bacteria and their interactions is important for explaining digestive and metabolic health problems.

This is a review article summarizing existing knowledge rather than new research, and it does not test hydrogen water or any intervention. It suggests that how the gut manages hydrogen gas may be relevant to digestive health, but the authors note that understanding of this process remains incomplete and mostly theoretical. More direct research is needed to determine whether this knowledge could inform practical health applications.

In the human gastrointestinal tract, dietary components, including fiber, that reach the colon are fermented principally to short-chain fatty acids, hydrogen, and carbon dioxide. Microbial disposal of the hydrogen generated during anaerobic fermentation in the human colon is critical to optimal…

Read the full abstract on PubMed