Extra virgin olive oil has long been praised as a staple of the Mediterranean diet, but new research suggests its benefits may go beyond heart health. A recent study indicates that extra virgin olive oil could also help protect brain function and improve gut health, especially in older adults at risk of metabolic disease.
Researchers found that people who regularly consumed extra virgin olive oil experienced better cognitive performance and healthier gut bacteria compared with those who used refined olive oil. The findings add to growing evidence that food quality matters just as much as calorie count when it comes to long-term wellness.
Olive oil is not a single product category. There are major differences between extra virgin olive oil and refined olive oil, particularly in how they are processed.
Extra virgin olive oil is made through mechanical extraction methods without heavy chemical treatment or excessive heat. This helps preserve naturally occurring compounds such as:
Refined olive oil, while still a source of healthy fats, undergoes additional processing to improve shelf life, remove impurities, and create a more neutral taste. However, this refining process can significantly reduce beneficial plant compounds.
That difference may explain why extra virgin olive oil appears to offer stronger brain and gut benefits.
The study followed 656 overweight or obese adults between the ages of 55 and 75 over a two-year period. Participants also had metabolic syndrome, a group of conditions linked to increased heart disease and diabetes risk.
Researchers monitored their diets, paying special attention to the type of olive oil consumed, while also assessing cognitive performance over time.
The results showed that participants who regularly consumed extra virgin olive oil had:
By contrast, refined olive oil did not show the same level of benefit.
One of the most interesting parts of the study involved gut bacteria. Scientists identified a bacterial group called Adlercreutzia that may play a role in the connection between extra virgin olive oil and brain health.
The gut and brain communicate through what experts call the gut-brain axis. This system links digestion, immune function, hormones, and nervous system signaling. When gut bacteria are balanced and diverse, they may help reduce inflammation and support healthy brain aging.
This means the benefits of extra virgin olive oil may not only come from healthy fats, but also from how it shapes the microbiome.
As people grow older, cognitive decline becomes a major concern. Memory issues, slower processing speed, and reduced concentration can affect quality of life. While genetics play a role, lifestyle choices such as diet, exercise, sleep, and stress management also strongly influence brain aging.
Adding foods linked with cognitive support may be a practical strategy for healthy aging. Extra virgin olive oil is especially appealing because it can easily be included in daily meals.
If you want to include more extra virgin olive oil in your routine, here are simple ideas:
Mix with lemon juice, vinegar, herbs, and garlic for a nutrient-rich dressing.
Add to roasted or steamed vegetables after cooking.
Use olive oil on toast or with bread in moderation.
A spoonful over soup, rice, quinoa, or pasta can add flavor and healthy fats.
Combine with nuts, legumes, fish, vegetables, and whole grains for broader health benefits.
Not all bottles are equal. When shopping, consider these tips:
Fresh oil typically has a peppery, grassy, or fruity flavor profile.
Even healthy fats contain calories, so portion awareness is important. Olive oil should be part of a balanced diet rather than consumed excessively. Many nutrition experts recommend using it to replace less healthy fats rather than simply adding extra calories.
This study reinforces a simple but powerful nutrition principle: food quality matters. Choosing minimally processed fats rich in natural compounds may support multiple systems in the body, including the heart, gut, and brain.
While no single food guarantees prevention of memory decline, consistent dietary patterns can make a meaningful difference over time. Extra virgin olive oil, especially as part of a Mediterranean-style eating plan, may be one of the easiest evidence-backed upgrades for long-term wellness.
Extra virgin olive oil continues to earn its reputation as one of the healthiest kitchen staples available. New findings suggest it may support sharper thinking and healthier gut bacteria in older adults, while refined olive oil may offer fewer of these protective effects.
For anyone looking to improve nutrition with one practical change, swapping processed fats for quality extra virgin olive oil could be a smart place to start.
University of Rovira i Virgili, April 18, 2026.
This article is for educational and informational purposes only. It is not medical advice, diagnosis, or treatment. Research findings describe general trends and may not apply to every individual. Always consult a qualified healthcare professional before making significant dietary or health changes.
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