A 2026 Mendelian-randomization study connected genetic proxies for certain gut bacteria with cognitive performance. The finding is a research clue, not evidence that a probiotic or diet can improve cognition.
A 2026 study has added to evidence that the gut microbiome may be linked to human cognition, finding genetic signatures associated with particular gut bacteria also associated with cognitive performance — another clue that the gut–brain connection may extend far beyond digestion.
Mind & Matter