Study links extra virgin olive oil to improved cognitive function through gut microbiome changes

Tue, 21 Apr 2026 02:31:00 +0200

A new study led by researchers from Universitat Rovira i Virgili and collaborating institutions suggests that extra virgin olive oil may support brain health by influencing the gut microbiome. The research followed 656 adults aged 55 to 75 who were overweight or had metabolic syndrome over a two-year period as part of the PREDIMED-Plus project. Participants’ diets, gut microbiota composition, and cognitive performance were closely monitored.

The findings showed that individuals who regularly consumed extra virgin olive oil experienced improved cognitive function and greater diversity in their gut microbiota, a marker commonly associated with better overall health. In contrast, those who consumed refined olive oil showed a decline in microbial diversity over time. Researchers also identified a specific type of bacteria, Adlercreutzia, which appears to be linked to the cognitive benefits observed, suggesting a possible biological mechanism connecting diet, gut health, and brain function