“Olive oil shown to support brain health through gut connection, scientists say”

Scientists say a specific type of olive oil—extra virgin olive oil—could play a meaningful role in supporting brain health, with new research pointing to its impact on the gut as a key factor.

Recent findings suggest that extra virgin olive oil may help improve cognitive function by reshaping the gut microbiome, the complex community of bacteria that lives in the digestive system. Researchers have increasingly linked gut health to brain performance through what is known as the gut-brain axis, a communication network that connects the digestive system and the central nervous system.

According to scientists, the natural compounds found in high-quality olive oil—particularly polyphenols—can encourage the growth of beneficial gut bacteria. These microbes are believed to influence inflammation, immune response and even the production of chemicals that affect mood and memory.

The distinction between different types of olive oil appears to be important. Extra virgin olive oil, which is less processed and retains more of its natural antioxidants, may offer stronger benefits compared to more refined varieties. This has led researchers to emphasise that quality, not just quantity, is key when incorporating olive oil into a diet.

The findings add to a growing body of evidence supporting diets rich in plant-based fats, such as the Mediterranean diet, which has long been associated with lower risks of cognitive decline and neurodegenerative conditions.

While scientists caution that olive oil alone is not a cure or guaranteed safeguard against brain disorders, they say it can be a valuable component of a balanced diet aimed at supporting long-term brain health.

Further research is ongoing, but the results so far suggest that something as simple as choosing a higher-quality cooking oil could have wider benefits beyond the kitchen—potentially supporting both gut health and cognitive function over time.