Australian research deciphers the important role of hydrogen in the digestive system

Hydrogen – normally released as a gas during digestion – actually plays an important role in maintaining gut health, according to research published in Nature Microbiology led by Monash University and the Hudson Institute of Medical Research (Australia).

Research reveals the crucial role of hydrogen in the digestive system. (Source: Nature Microbiology)

Scientists say hydrogen is produced when gut bacteria ferment undigested carbohydrates. Some of this hydrogen is excreted, but much of it is reused by other bacteria, aiding digestion and shaping the gut microbiome.

This discovery could open up avenues for developing new therapies based on the microbiome to treat gastrointestinal diseases.

Dr. Caitlin Welsh, the study's lead author, said: "On average, each person excretes about 1 liter of gas per day, half of which is hydrogen. But hydrogen isn't just a cause of bloating; it's also a potential factor in promoting gut health."

Research shows that bacteria in the gut produce hydrogen thanks to a special enzyme called Group B [FeFe]-hydrogenase.

However, scientists warn that when hydrogen levels in the gut are too high or too low, patients may experience problems such as infections, digestive disorders, or even cancer. These hydrogen levels are often checked through breath tests to assess gut health.

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