Cohabiting people share about a quarter of their gut and oral microbiota, study finds (opens in new tab)

People who live together share more oral and gut microbes with each other than with other people in their communities, according to a study published in Cell Press Blue. This was true regardless of the cohabitants' relationships—siblings, parents and offspring all shared similar numbers of microbial strains, and romantic partners shared even more oral, but not gut, microbes with each other, likely due to kissing.