Methanogens: vital but threatened members of the human microbiome?

Methanogens, key methane-producing archaea in the human gut, are declining in abundance, potentially impacting human metabolism and microbiome stability.

• Why it matters: Understanding their decline is crucial because methanogens influence bacterial fermentation and fatty acid production, which are vital for human health. Their reduction may signify broader microbiome disruptions linked to industrialization.
• What they did: The study reviews the evolution, ecological roles, and recent evidence of decreasing methanogen prevalence in the human microbiome, highlighting their importance as keystone species.
• The result: If the decline is confirmed, it could lead to significant metabolic changes, emphasizing the need for conservation efforts to preserve these archaea and maintain microbiome health.