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Methane-producing archaea, or methanogens produce methane from hydrogen and CO₂ for example, and contribute to the microbial metabolic processes as well as in the human gut, according to Christine Moissl-Eichinger, Professor of Interactive Microbiome Research at Medical University of Graz, reported in an April 17 2025 issue of Phys.org. 

 
Archaea were originally discovered above all in extreme environments such as hot springs or salt lakes, but they are also found in the human body, especially in the gut.

 

Dr. Moissl-Eichinger believes that archaea may play a significant role in the development or progression of certain disease. She and her team’s discovery shows archaea thriving under strictly anaerobic conditions, producing methane, and surprisingly large amounts of succinic acid, a metabolic product that is associated with inflammatory processes in the human body.