Indigenous Yanomami gut microbiota protects against diet-induced metabolic dysfunction

Yanomami gut microbiota transplanted into germ-free mice significantly attenuates high-fat diet–induced metabolic dysfunction, reducing weight gain and diabetes incidence while promoting Th2 immunity.

• Why it matters: Industrialization-linked loss of microbial diversity is linked to rising obesity and chronic inflammatory disease, but direct experimental proof of protective microbiota is limited.
• What they did: Gut communities from Indigenous Brazilian Yanomami and urban Belgian donors were transplanted into germ-free mice, which then received a high-fat diet to test metabolic outcomes and immune responses.
• The result: Yanomami-derived communities showed greater richness, VANISH taxa enrichment, enhanced ecological stability, and post-HFD enrichment for short-chain fatty acid–associated taxa and functions.

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