Methanobrevibacter smithii is the dominant archaeon in the human gut. It is important for the efficient digestion of polysaccharides (complex sugars) because it consumes end products of bacterial fermentation. Methanobrevibacter smithii is a single-celled micro-organism from the Archaea domain. M. smithii recycles hydrogen in methane, allowing for an increase in the transformation of nutrients into calories.
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