Olive Oil and the Mediterranean Diet
See how extra virgin olive oil works as the main fat in the Mediterranean diet, what the eating pattern looks like, and the heart-health evidence behind it.
The Mediterranean diet is an eating pattern built around vegetables, legumes, wholegrains, fish and extra virgin olive oil as the main fat. Olive oil is the thread that ties it together. It is used generously, every day, in place of butter and other fats. Large studies have linked this pattern to better heart health, which is a big part of why it gets so much attention.
This article is general information, not medical advice.
Olive oil as the main fat
In most modern diets, fat comes from a scatter of sources: butter, seed oils, spreads, processed foods. In the traditional Mediterranean pattern, the main fat is extra virgin olive oil, and it is used with a free hand.
That means dressing salads and vegetables, finishing soups and beans, drizzling over bread, and cooking everyday meals. The point is not to add a token spoonful. Olive oil is the everyday cooking and finishing fat, which is a real shift for many Australian kitchens. For technique, see cooking with extra virgin olive oil.
Because olive oil replaces other fats rather than being piled on top of them, the pattern does not automatically mean eating more total fat. It means changing the type of fat. Extra virgin olive oil is high in monounsaturated fat, mainly oleic acid, and it carries vitamin E and polyphenol antioxidants that refined fats lack. More on those compounds is in our guide to olive oil polyphenols.
What the pattern looks like
The Mediterranean diet is less a strict menu and more a set of habits. In broad terms it looks like this.
- Plenty of vegetables, fruit, legumes, nuts and wholegrains.
- Extra virgin olive oil as the main added fat.
- Fish and seafood on a regular basis.
- Moderate amounts of dairy, mostly as yoghurt and cheese.
- Poultry and eggs in smaller amounts.
- Red and processed meat only occasionally.
- Sweets and heavily processed food kept to a minimum.
Meals are typically built around plants, with olive oil making vegetables and legumes taste good enough to eat often. That last point matters. A drizzle of good oil is part of why people stick with eating this way. The broader benefits are covered in olive oil health benefits.
The heart-health evidence
The strongest reason this pattern is taken seriously is the research behind it.
The best known trial is PREDIMED, a large Spanish study of people at higher cardiovascular risk. Participants followed a Mediterranean diet supplemented with either extra virgin olive oil or nuts, and were compared with a lower-fat control. The groups following the Mediterranean pattern, including the one given extra virgin olive oil, showed better heart-health outcomes over the study period.
Findings like these are why bodies such as the Heart Foundation and researchers at CSIRO have taken an interest in Mediterranean-style eating. It is consistently linked to better heart health in large studies. The careful way to say it is that the pattern is associated with these outcomes, and olive oil is a central part of it, not a lone magic ingredient. The benefit comes from the whole way of eating.
Using EVOO as an everyday staple
Adopting the pattern does not require a Mediterranean pantry or special recipes. A few swaps do most of the work.
- Use extra virgin olive oil where you would reach for butter or a neutral seed oil.
- Dress salads and cooked vegetables with oil, lemon and a pinch of salt.
- Finish soups, pasta and grilled fish with a raw drizzle at the table.
- Roast vegetables in a generous coat of oil rather than a light spray.
- Build more meals around legumes, and use oil to make them satisfying.
Quality is worth it here because you will use the oil raw as well as for cooking. A fresh, robust bottle rewards you with more flavour and more of the polyphenols worth having. A high-polyphenol variety such as Coratina olive oil suits finishing and dressing.
Keep an eye on portions if you are watching kilojoules, since oil is energy dense. One tablespoon has roughly 120 Calories, about 500 kilojoules. The details are in olive oil calories. Within a pattern that leans on plants and fish, that energy is generally well spent, and swapping olive oil for less healthy fats is the change that matters most. For how it stacks up against alternatives, see olive oil vs other oils.