607 stool samples were studied for DNA sequencing of adults across the country with a mean age of 55. The genera Barnesiella, Lachnospiraceae, and Akkermansia were positively associated with at least one of the cognitive tests, while Sutterella was negatively associated with one test.
Scientists believe that short-chain fatty acids play a part in regulating how the gut and brain interact. Short-chain fatty acids have been associated with protection against vascular dementia and cognitive impairment, according to the Medical News Today article.
Related news: https://www.the-scientist.com/news-opinion/bacteria-infecting-viruses-in-gut-microbiome-linked-to-cognition-69709