Social Networks Shape Microbiome Composition
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Based on a study of isolated villages in Honduras, researchers investigated the connection between social interactions and gut microbiome sharing among adults. They found that strain-sharing of gut microbes occurs not only within families and households but also between friends and other non-kin connections, with more frequent and physically close interactions leading to higher sharing rates. The strain-sharing rate was a strong predictor of social ties, and social network structure corresponded to patterns of microbiome similarity, suggesting that social groups create niches for microbial communities. More socially central individuals had microbiomes more representative of the overall village, while being less similar to their direct connections.
1.Beghini, F. et al. Gut microbiome strain-sharing within isolated village social networks. Nature 637, 167–175 (2025).
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