Extra virgin olive oil associated with preserved cognition through the gut microbiota
Feb 23rd 2026
A URV-led prospective study of 656 adults aged 55 to 75 in the PREDIMED-Plus trial found that consuming extra virgin olive oil, compared with refined olive oil, was linked to greater gut microbiota diversity and better cognitive outcomes over two years.
- The study followed 656 overweight or obese adults with metabolic syndrome for two years and compared effects of extra virgin versus refined olive oil on cognition and gut bacteria.
- Extra virgin olive oil consumption was associated with improved cognitive function while refined olive oil was linked to decreased gut microbiota diversity over time.
- Researchers identified the bacterial genus Adlercreutzia as a possible marker connecting extra virgin olive oil intake and preserved cognitive function.
- Authors note extra virgin olive oil retains polyphenols and other bioactive compounds lost in refining, which may explain its distinct effects on gut microbiota and brain health.